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QUESTION 51
You executed a DROP USER CASCADE on an Oracle 11g release 1 database and immediately realized that you forgot to copy the OCA.EXAM_RESULTS table to the OCP schema.
The RECYCLE_BIN enabled before the DROP USER was executed and the OCP user has been granted the FLASHBACK ANY TABLE system privilege.
What is the quickest way to recover the contents of the OCA.EXAM_RESULTS table to the OCP schema?

A.    Execute FLASHBACK TABLE OCA.EXAM_RESULTS TO BEFORE DROP RENAME TO
OCP.EXAM_RESULTS; connected as SYSTEM.
B.    Recover the table using traditional Tablespace Point In Time Recovery.
C.    Recover the table using Automated Tablespace Point In Time Recovery.
D.    Recovery the table sing Database Point In Time Recovery.
E.    Execute FLASHBACK TABLE OCA.EXAM_RESULTS TO BEFORE DROP RENAME TO
EXAM_RESULTS; connected as the OCP user.

Answer: E
Explanation:
*To flash back a table to an earlier SCN or timestamp, you must have either the FLASHBACK object privilege on the table or the FLASHBACK ANY TABLE system privilege.
* From question:the OCP user has been granted the FLASHBACK ANY TABLE system privilege.
*Syntax
flashback_table::=

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QUESTION 52
In your multitenant container database (CDB) containing pluggable database (PDBs), the HR user executes the following commands to create and grant privileges on a procedure:
CREATE OR REPLACE PROCEDURE create_test_v (v_emp_id NUMBER, v_ename
VARCHAR2, v_SALARY NUMBER, v_dept_id NUMBER)
BEGIN
INSERT INTO hr.test VALUES (V_emp_id, V_ename, V_salary, V_dept_id);
END;
/
GRANT EXECUTE ON CREATE_TEST TO john, jim, smith, king;
How can you prevent users having the EXECUTE privilege on the CREATE_TEST procedure from inserting values into tables on which they do not have any privileges?

A.    Create the CREATE_TEST procedure with definer’s rights.
B.    Grant the EXECUTE privilege to users with GRANT OPTION on the CREATE_TEST procedure.
C.    Create the CREATE_TEST procedure with invoker’s rights.
D.    Create the CREATE_TEST procedure as part of a package and grant users the EXECUTE privilege
the package.

Answer: C
Explanation:
If a program unit does not need to be executed with the escalated privileges of the definer, you should specify that the program unit executes with the privileges of the caller, also known as the invoker. Invoker’s rights can mitigate the risk of SQL injection.
Incorrect:
Not A: By default, stored procedures and SQL methods execute with the privileges of their owner, not their current user. Such definer-rights subprograms are bound to the schema in which they reside.
not B:Using the GRANT option, a user can grant an Object privilege to another user or to PUBLIC.

QUESTION 53
You created a new database using the “create database” statement without specifying the “ENABLE PLUGGABLE” clause.
What are two effects of not using the “ENABLE PLUGGABLE database” clause?

A.    The database is created as a non-CDB and can never contain a PDB.
B.    The database is treated as a PDB and must be plugged into an existing multitenant container database (CDB).
C.    The database is created as a non-CDB and can never be plugged into a CDB.
D.    The database is created as a non-CDB but can be plugged into an existing CDB.
E.    The database is created as a non-CDB but will become a CDB whenever the first PDB is plugged in.

Answer: AD
Explanation:
A (not B,not E): The CREATE DATABASE … ENABLE PLUGGABLE DATABASE SQL statement creates a new CDB. If you do not specify the ENABLE PLUGGABLE DATABASE clause, then the newly created database is a non-CDB and can never contain PDBs.
D: You can create a PDB by plugging in a Non-CDB as a PDB. The following graphic depicts the options for creating a PDB:

clip_image001
Description of cncpt358.png follows
Incorrect:
Not E:For the duration of its existence, a database is either a CDB or a non-CDB. You cannot transform a non-CDB into a CDB or vice versa. You must define a database as a CDB at creation, and then create PDBs within this CDB.

QUESTION 54
What is the effect of specifying the “ENABLE PLUGGABLE DATABASE” clause in a “CREATE DATABASE” statement?

A.    It will create a multitenant container database (CDB) with only the root opened.
B.    It will create a CDB with root opened and seed read only.
C.    It will create a CDB with root and seed opened and one PDB mounted.
D.    It will create a CDB that must be plugged into an existing CDB.
E.    It will create a CDB with root opened and seed mounted.

Answer: B
Explanation:
*The CREATE DATABASE … ENABLE PLUGGABLE DATABASE SQL statement creates a new CDB. If you do not specify the ENABLE PLUGGABLE DATABASE clause, then the newly created database is a non-CDB and can never contain PDBs.
Along with the root (CDB$ROOT), Oracle Database automatically creates a seed PDB (PDB$SEED). The following graphic shows a newly created CDB:

clip_image001[4]
*Creating a PDB
Rather than constructing the data dictionary tables that define an empty PDB from scratch, and then populating its Obj$ and Dependency$ tables, the empty PDB is created when the CDB is created. (Here, we use empty to mean containing no customer-created artifacts.) It is referred to as the seed PDB and has the name PDB$Seed. Every CDB non-negotiably contains a seed PDB; it is non-negotiably always open in read-only mode. This has no conceptual significance; rather, it is just an optimization device. The create PDB operation is implemented as a special case of the clone PDB operation.

QUESTION 55
You have installed two 64G flash devices to support the Database Smart Flash Cache feature on your database server that is running on Oracle Linux.
You have set the DB_SMART_FLASH_FILE parameter:
DB_FLASH_CACHE_FILE= `/dev/flash_device_1 `,’ /dev/flash_device_2′
How should the DB_FLASH_CACHE_SIZE be configured to use both devices?

A.    Set DB_FLASH_CACHE_ZISE = 64G.
B.    Set DB_FLASH_CACHE_ZISE = 64G, 64G
C.    Set DB_FLASH_CACHE_ZISE = 128G.
D.    DB_FLASH_CACHE_SIZE is automatically configured by the instance at startup.

Answer: B
Explanation:
* Smart Flash Cache concept is not new in Oracle 12C – DB Smart Flash Cache in Oracle 11g.
In this release Oracle has made changes related to both initialization parameters used by DB Smart Flash cache. Now you can define many files|devices and its sizes for “Database Smart Flash Cache” area. In previous releases only one file|device could be defined.
DB_FLASH_CACHE_FILE = /dev/sda, /dev/sdb, /dev/sdc
DB_FLASH_CACHE_SIZE = 32G, 32G, 64G
So above settings defines 3 devices which will be in use by “DB Smart Flash Cache”
/dev/sda ?size 32G
/dev/sdb ?size 32G
/dev/sdc ?size 64G
New view V$FLASHFILESTAT ?it’s used to determine the cumulative latency and read counts of each file|device and compute the average latency

QUESTION 56
Examine the following parameters for a database instance:
MEMORY_MAX_TARGET=0
MEMORY_TARGET=0
SGA_TARGET=0
PGA_AGGREGATE_TARGET=500m
Which three initialization parameters are not controlled by Automatic Shared Memory Management (ASMM)?

A.    LOG_BUFFER
B.    SORT_AREA_SIZE
C.    JAVA_POOL_SIZE
D.    STREAMS_POOL_SIZE
E.    DB_16K_CACHE_SZIE
F.    DB_KEEP_CACHE_SIZE

Answer: AEF
Explanation:
Manually Sized SGA Components that Use SGA_TARGET Space SGA Component,Initialization Parameter
/The log buffer
LOG_BUFFER
/The keep and recycle buffer caches
DB_KEEP_CACHE_SIZE
DB_RECYCLE_CACHE_SIZE
/Nonstandard block size buffer caches
DB_nK_CACHE_SIZE
Note:
* In addition to setting SGA_TARGET to a nonzero value, you must set to zero all initialization parameters listed inthe table belowto enable full automatic tuning of the automatically sized SGA components.
* Table,Automatically Sized SGA Components and Corresponding Parameters

QUESTION 57
Examine the contents of SQL loader control file:
Which three statements are true regarding the SQL* Loader operation performed using the control file?

clip_image001[6]

A.    An EMP table is created if a table does not exist. Otherwise, if the EMP table is appended with the loaded data.
B.    The SQL* Loader data file myfile1.dat has the column names for the EMP table.
C.    The SQL* Loader operation fails because no record terminators are specified.
D.    Field names should be the first line in the both the SQL* Loader data files.
E.    The SQL* Loader operation assumes that the file must be a stream record format file with the normal carriage
return string as the record terminator.

Answer: ABE
Explanation:
A:The APPEND keyword tells SQL*Loader to preserve any preexisting data in the table. Other options allow you to delete preexisting data, or to fail with an error if the table is not empty to begin with.
B(not D):
Note:
*SQL*Loader-00210: first data file is empty, cannot process the FIELD NAMES record Cause: The data file listed in the next message was empty. Therefore, the FIELD NAMES FIRST FILE directive could not be processed.
Action: Check the listed data file and fix it. Then retry the operation
E:
*A comma-separated values (CSV) (also sometimes called character-separated values, because the separator character does not have to be a comma) file stores tabular data (numbers and text) in plain-text form. Plain text means that the file is a sequence of characters, with no data that has to be interpreted instead, as binary numbers. A CSV file consists of any number of records, separated by line breaks of some kind; each record consists of fields, separated by some other character or string, most commonly a literal comma or tab. Usually, all records have an identical sequence of fields.
*Fields with embedded commas must be quoted.
Example:
1997,Ford,E350,”Super, luxurious truck”
Note:
*SQL*Loader is a bulk loader utility used for moving data from external files into the Oracle database.

QUESTION 58
In your multitenant container database (CDB) containing pluggable database (PDBs), you granted the CREATE TABLE privilege to the common user C # # A_ADMIN in root and all PDBs. You execute the following command from the root container:
SQL > REVOKE create table FROM C # # A_ADMIN;
What is the result?

A.    It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only.
B.    It fails and reports an error because the CONTAINER=ALL clause is not used.
C.    It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs.
D.    It fails and reports an error because the CONTAINER=CURRENT clause is not used.
E.    It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in all PDBs.

Answer: A
Explanation:
REVOKE ..FROM
If the current container is the root:
/Specify CONTAINER = CURRENT to revoke a locally granted system privilege, object privilege, or role from a common user or common role. The privilege or role is revoked from the user or role only in the root. This clause does not revoke privileges granted with CONTAINER = ALL.
/Specify CONTAINER = ALL to revoke a commonly granted system privilege, object privilege on a common object, or role from a common user or common role. The privilege or role is revoked from the user or role across the entire CDB. This clause can revoke only a privilege or role granted with CONTAINER = ALL from the specified common user or common role. This clause does not revoke privileges granted locally with CONTAINER = CURRENT. However, any locally granted privileges that depend on the commonly granted privilege being revoked are also revoked.
If you omit this clause, then CONTAINER = CURRENT is the default.

QUESTION 59
Which two statements are true concerning the Resource Manager plans for individual pluggable databases (PDB plans) in a multitenant container database (CDB)?

A.    If no PDB plan is enabled for a pluggable database, then all sessions for that PDB are treated to an
equal degree of the resource share of that PDB.
B.    In a PDB plan, subplans may be used with up to eight consumer groups.
C.    If a PDB plan is enabled for a pluggable database, then resources are allocated toconsumergroups
across all PDBs in the CDB.
D.    If no PDB plan is enabled for a pluggable database, then the PDB share in the CDB plan is dynamically
calculated.
E.    If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups
based on the shares provided to the PDB in the CDB plan and the shares provided to the consumer
groups in the PDB plan.

Answer: ADE
Explanation:
A:Setting a PDB resource plan is optional. If not specified, allsessions within the PDB are treated equally.
*
In a non-CDB database, workloads within a databaseare managed with resource plans. In a PDB, workloads are also managed with resourceplans, also called PDB resource plans. The functionality is similar except for the followingdifferences:
/Non-CDBDatabase
Multi-level resource plans
Up to 32 consumer groups
Subplans
/PDBDatabase
Single-level resource plansonly
Up to 8 consumer groups
(not B)No subplans
Incorrect Not C

QUESTION 60
You use a recovery catalog for maintaining your database backups.
You execute the following command:
$rman TARGET / CATALOG rman / cat@catdb
RMAN > BACKUP VALIDATE DATABASE ARCHIVELOG ALL;
Which two statements are true?

A.    Corrupted blocks, if any, are repaired.
B.    Checks are performed for physical corruptions.
C.    Checks are performed for logical corruptions.
D.    Checks are performed to confirm whether all database files exist in correct locations
E.    Backup sets containing both data files and archive logs are created.

Answer: BD
Explanation:
B (not C): You can validate that all database files and archived redo logs can be backed up by running a command as follows:
RMAN> BACKUP VALIDATE DATABASE ARCHIVELOG ALL;
This form of the command would check for physical corruption. To check for logical corruption,
RMAN> BACKUP VALIDATE CHECK LOGICAL DATABASE ARCHIVELOG ALL;
D: You can use the VALIDATE keyword of the BACKUP command to do the following:
Check datafiles for physical and logical corruption
Confirm that all database files exist and are in the correct locations.
Note:
You can use theVALIDATEoption of theBACKUPcommand to verify that database files exist and are in the correct locations (D), and have no physical or logical corruptions that would prevent RMAN from creating backups of them. When performing aBACKUP…VALIDATE, RMAN reads the files to be backed up in their entirety, as it would during a real backup. It does not, however, actually produce any backup sets or image copies (Not A, not E).

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QUESTION 41
You are planning the creation of a new multitenant container database (CDB) and want to store the ROOT and SEED container data files in separate directories.
You plan to create the database using SQL statements.
Which three techniques can you use to achieve this?

A.    Use Oracle Managed Files (OMF).
B.    Specify the SEED FILE_NAME_CONVERT clause.
C.    Specify the PDB_FILE_NAME_CONVERT initialization parameter.
D.    Specify the DB_FILE_NAMECONVERT initialization parameter.
E.    Specify all files in the CREATE DATABASE statement without using Oracle managed Files (OMF).

Answer: ABC
Explanation:
You must specify the names and locations of the seed’s files in one of the following ways:
* (A) Oracle Managed Files
* (B) The SEED FILE_NAME_CONVERT Clause
* (C) The PDB_FILE_NAME_CONVERT Initialization Parameter

QUESTION 42
You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB).
The characteristics of the non-CDB are as follows:
– Version: Oracle Database 11gRelease 2 (11.2.0.2.0) 64-bit
– Character set: AL32UTF8
– National character set: AL16UTF16
– O/S: Oracle Linux 6 64-bit
The characteristics of the CDB are as follows:
– Version: Oracle Database 12c Release 1 64-bit
– Character Set: AL32UTF8
– National character set: AL16UTF16
– O/S: Oracle Linux 6 64-bit
Which technique should you use to minimize down time while plugging this non-CDB into the CDB?

A.    Transportable database
B.    Transportable tablespace
C.    Data Pump full export/import
D.    The DBMS_PDB package
E.    RMAN

Answer: D
Explanation:
*Overview, example:
– Log into ncdb12c as sys
– Get the database in a consistent state by shutting it down cleanly.
– Open the database in read only mode
– Run DBMS_PDB.DESCRIBE to create an XML file describing the database.
– Shut down ncdb12c
– Connect to target CDB (CDB2)
– Check whether non-cdb (NCDB12c) can be plugged into CDB(CDB2)
– Plug-in Non-CDB (NCDB12c) as PDB(NCDB12c) into target CDB(CDB2).
– Access the PDB and run the noncdb_to_pdb.sql script.
– Open the new PDB in read/write mode.
*You can easily plug an Oracle Database 12c non-CDB into a CDB. Just create a PDB manifest file for the non-CDB, and then use the manifest file to create a cloned PDB in the CDB. *Note that to plugin a non-CDB database into a CDB, the non-CDB database needs to be of version 12c as well. So existing 11g databases will need to be upgraded to 12c before they can be part of a 12c CDB.

QUESTION 43
Your database supports an online transaction processing (OLTP) application. The application is undergoing some major schema changes, such as addition of new indexes and materialized views. You want to check the impact of these changes on workload performance.
What should you use to achieve this?

A.    Database replay
B.    SQL Tuning Advisor
C.    SQL Access Advisor
D.    SQL Performance Analyzer
E.    Automatic Workload Repository compare reports

Answer: E
Explanation:
While an AWR report shows AWR data between two snapshots (or two points in time), the AWR Compare Periods report shows the difference between two periods (or two AWR reports with a total of four snapshots). Using the AWR Compare Periods report helps you to identify detailed performance attributes and configuration settings that differ between two time periods.

QUESTION 44
An administrator account is granted the CREATE SESSION and SET CONTAINER system privileges.
A multitenant container database (CDB) instant has the following parameter set:
THREADED_EXECUTION = FALSE
Which four statements are true about this administrator establishing connections to root in a CDB that has been opened in read only mode?

A.    You can conned as a common user by using the connect statement.
B.    You can connect as a local user by using the connect statement.
C.    You can connect by using easy connect.
D.    You can connect by using OS authentication.
E.    You can connect by using a Net Service name.
F.    You can connect as a local user by using the SET CONTAINER statement.

Answer: CDEF
Explanation:
*The choice of threading model is dictated by the THREADED_EXECUTION initialization parameter.
THREADED_EXECUTION=FALSE: The default value causes Oracle to run using the multiprocess model.
THREADED_EXECUTION=TRUE: Oracle runs with the multithreaded model. *OS Authentication is not supported with the multithreaded model.
*THREADED_EXECUTION
When this initialization parameter is set to TRUE, which enables the multithreaded Oracle model, operating system authentication is not supported. Attempts to connect to the database using operating system authentication (for example, CONNECT / AS SYSDBA or CONNECT / ) when this initialization parameter is set to TRUE receive an ORA-01031″insufficient privileges” error.
F:The new SET CONTAINER statement within a call back function:
The advantage of SET CONTAINER is that the pool does not have to create a new connection to a PDB, if there is an exisitng connection to a different PDB. The pool can use the existing connection, and through SET CONTAINER, can connect to the desired PDB. This can be done using:
ALTER SESSION SET CONTAINER=<PDB Name>
This avoids the need to create a new connection from scratch.

QUESTION 45
Examine the following query output:

clip_image002
You issue the following command to import tables into the hr schema:
$ > impdp hr/hr directory = dumpdir dumpfile = hr_new.dmp schemas=hr TRANSFORM=DISABLE_ARCHIVE_LOGGING: Y
Which statement is true?

A.    All database operations performed by the impdp command are logged.
B.    Only CREATE INDEX and CREATE TABLE statements generated by the import are logged.
C.    Only CREATE TABLE and ALTER TABLE statements generated by the import are logged.
D.    None of the operations against the master table used by Oracle Data Pump to coordinate its activities
are logged.

Answer: D
Explanation:
* From the exhibit we see that FORCE_LOGGING is set to NO.
* Datapump Import impdp in 12c includes a new parameter to disable logging during data import. This option could improve performance of import tremendously during large data loads.
The TRANSFORM=DISABLE_ARCHIVE_LOGGING is used to disable logging. The value can be Y or N. Y to disable logging and N to enable logging.
However, if the database is running with FORCE LOGGING enabled, data pump ignores disable logging request.
Note:
* When the primary database is in FORCE LOGGING mode, all database data changes are logged. FORCE LOGGING mode ensures that the standby database remains consistent with the primary database.
* force_logging V$database
A tablespace or the entire database is either in force logging or no force logging mode. To see which it is, run:
SQL> SELECT force_logging FROM v$database;
FOR

NO

QUESTION 46
You notice a performance change in your production Oracle database and you want to know which change has made this performance difference.
You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation.
Which three findings would you get from the report?

A.    It detects any configuration change that caused a performance difference in both time periods.
B.    It identifies any workload change that caused a performance difference in both time periods.
C.    It detects the top wait events causing performance degradation.
D.    It shows the resource usage for CPU, memory, and I/O in both time periods.
E.    It shows the difference in the size of memory pools in both time periods.
F.    It gives information about statistics collection in both time periods.

Answer: ABE
Explanation:
Keyword: shows the difference.
*Full ADDM analysis across two AWR snapshot periods
Detects causes, measure effects, then correlates them
Causes: workload changes, configuration changes
Effects: regressed SQL, reach resource limits (CPU, I/O, memory, interconnect) Makes actionable recommendations along with quantified impact *Identify what changed
/Configuration changes, workload changes
*Performance degradation of the database occurs when your database was performing optimally in the past, such as 6 months ago, but has gradually degraded to a point where it becomes noticeable to the users. The Automatic Workload Repository (AWR) Compare Periods report enables you to compare database performance between two periods of time.
While an AWR report shows AWR data between two snapshots (or two points in time), the AWR Compare Periods report shows the difference (ABE) between two periods (or two AWR reports with a total of four snapshots). Using the AWR Compare Periods report helps you to identify detailed performance attributes and configuration settings that differ between two time periods.

QUESTION 47
Examine the parameter for your database instance:

clip_image002[4]
You generated the execution plan for the following query in the plan table and noticed that the nested loop join was done. After actual execution of the query, you notice that the hash join was done in the execution plan:
Identify the reason why the optimizer chose different execution plans.

clip_image001

A.    The optimizer used a dynamic plan for the query.
B.    The optimizer chose different plans because automatic dynamic sampling was enabled.
C.    The optimizer used re-optimization cardinality feedback for the query.
D.    The optimizer chose different plan because extended statistics were created for the columns used.

Answer: B
Explanation:
* optimizer_dynamic_sampling
OPTIMIZER_DYNAMIC_SAMPLING controls both when the database gathers dynamic statistics,
and the size of the sample that the optimizer uses to gather the statistics.
Range of values0 to 11

QUESTION 48
Which three statements are true about adaptive SQL plan management?

A.    It automatically performs verification or evolves non-accepted plans, in COMPREHENSIVE mode when
they perform better than existing accepted plans.
B.    The optimizer always uses the fixed plan, if the fixed plan exists in the plan baseline.
C.    It adds new, bettor plans automatically as fixed plans to the baseline.
D.    The non-accepted plans are automatically accepted and become usable by the optimizer if they perform
better than the existing accepted plans.
E.    The non-accepted plans in a SQL plan baseline are automatically evolved, in COMPREHENSIVE mode,
during the nightly maintenance window and a persistent verification report is generated.

Answer: ADE
Explanation:
With adaptive SQL plan management, DBAs no longer have to manually run the verification or evolve process for non-accepted plans. When automatic SQL tuning is in COMPREHENSIVE mode, it runs a verification or evolve process for all SQL statements that have non-accepted plans during the nightly maintenance window. If the non-accepted plan performs better than the existing accepted plan (or plans) in the SQL plan baseline, then the plan is automatically accepted and becomes usable by the optimizer. After the verification is complete, a persistent report is generated detailing how the non-accepted plan performs compared to the accepted plan performance. Because the evolve process is now an AUTOTASK, DBAs can also schedule their own evolve job at end time.
Note:
*The optimizer is able to adapt plans on the fly by predetermining multiple subplans for portions of the
plan.
*Adaptive plans, introduced in Oracle Database 12c, enable the optimizer to defer the final plan decisionfor a statement until execution time. The optimizer instruments its chosen plan (the default plan) withstatistics collectors so that it can detect at runtime, if its cardinality estimates differ greatly from theactual number of rows seen by the operations in the plan. If there is a significant difference, then theplan or a portion of it will be automatically adapted to avoid suboptimal performance on the firstexecution of a SQL statement.

QUESTION 49
You create a new pluggable database, HR_PDB, from the seed database. Which three tablespaces are created by default in HR_PDB?

A.    SYSTEM
B.    SYSAUX
C.    EXAMPLE
D.    UNDO
E.    TEMP
F.    USERS

Answer: ABE
Explanation:
*A PDB would have its SYSTEM, SYSAUX, TEMP tablespaces.It can also contains other user created tablespaces in it.
*
*Oracle Database creates both the SYSTEM and SYSAUX tablespaces as part of every database.
*tablespace_datafile_clauses
Use these clauses to specify attributes for all data files comprising the SYSTEM and SYSAUX tablespaces in the seed PDB.
Incorrect:
Not D:a PDB can not have an undo tablespace. Instead, it uses the undo tablespace belonging to the CDB.
Note:
* Example:
CONN pdb_admin@pdb1
SELECT tablespace_name FROM dba_tablespaces;
TABLESPACE_NAME
——————————
SYSTEM
SYSAUX
TEMP
USERS
SQL>

QUESTION 50
Which two statements are true about variable extent size support for large ASM files?

A.    The metadata used to track extents in SGA is reduced.
B.    Rebalance operations are completed faster than with a fixed extent size
C.    An ASM Instance automatically allocates an appropriate extent size.
D.    Resync operations are completed faster when a disk comes online after being taken offline.
E.    Performance improves in a stretch cluster configuration by reading from a local copy of an extent.

Answer: AC
Explanation:
A:Variable size extents enable support for larger ASM datafiles, reduce SGA memory requirements for very large databases(A), and improve performance for file create and open operations.
C:You don’t have to worry about the sizes; the ASM instance automatically allocates the appropriate extent size.
Note:
*The contents of ASM files are stored in a disk group as a set, or collection, of data extents that are stored on individual disks within disk groups. Each extent resides on an individual disk. Extents consist of one or more allocation units (AU). To accommodate increasingly larger files, ASM uses variable size extents.
*The size of the extent map that defines a file can be smaller by a factor of 8 and 64 depending on the file size. The initial extent size is equal to the allocation unit size and it increases by a factor of 8 and 64 at predefined thresholds. This feature is automatic for newly created and resized datafiles when the disk group compatibility attributes are set to Oracle Release 11 or higher.

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QUESTION 31
You upgrade your Oracle database in a multiprocessor environment. As a recommended you execute the following script:
SQL > @utlrp.sql
Which two actions does the script perform?

A.    Parallel compilation of only the stored PL/SQL code
B.    Sequential recompilation of only the stored PL/SQL code
C.    Parallel recompilation of any stored PL/SQL code
D.    Sequential recompilation of any stored PL/SQL code
E.    Parallel recompilation of Java code
F.    Sequential recompilation of Java code

Answer: CE
Explanation:
utlrp.sql and utlprp.sql
The utlrp.sql and utlprp.sql scripts are provided by Oracle to recompile all invalid objects in the database. They are typically run after major database changes such as upgrades or patches. They are located in the $ORACLE_HOME/rdbms/admin directory and provide a wrapper on the UTL_RECOMP package. The utlrp.sql script simply calls the utlprp.sql script with a command line parameter of “0”. The utlprp.sql accepts a single integer parameter that indicates the level of parallelism as follows.
0 – The level of parallelism is derived based on the CPU_COUNT parameter. 1 – The recompilation is run serially, one object at a time. N – The recompilation is run in parallel with “N” number of threads. Both scripts must be run as the SYS user, or another user with SYSDBA, to work correctly.

QUESTION 32
Which statement is true concerning dropping a pluggable database (PDB)?

A.    The PDB must be open in read-only mode.
B.    The PDB must be in mount state.
C.    The PDB must be unplugged.
D.    The PDB data files are always removed from disk.
E.    A dropped PDB can never be plugged back into a multitenant container database (CDB).

Answer: C

QUESTION 33
You notice a high number of waits for the db file scattered read and db file sequential read events in the recent Automatic Database Diagnostic Monitor (ADDM) report. After further investigation, you find that queries are performing too many full table scans and indexes are not being used even though the filter columns are indexed.
Identify three possible reasons for this.

A.    Missing or stale histogram statistics
B.    Undersized shared pool
C.    High clustering factor for the indexes
D.    High value for the DB_FILE_MULTIBLOCK_READ_COUNT parameter
E.    Oversized buffer cache

Answer: ACD
Explanation:
D:DB_FILE_MULTIBLOCK_READ_COUNT is one of the parameters you can use to minimize I/O during table scans. It specifies the maximum number of blocks read in one I/O operation during a sequential scan. The total number of I/Os needed to perform a full table scan depends on such factors as the size of the table, the multiblock read count, and whether parallel execution is being utilized for the operation.

QUESTION 34
Which three features work together, to allow a SQL statement to have different cursors for the same statement based on different selectivity ranges?

A.    Bind Variable Peeking
B.    SQL Plan Baselines
C.    Adaptive Cursor Sharing
D.    Bind variable used in a SQL statement
E.    Literals in aSQL statement

Answer: ACE
Explanation:
*In bind variable peeking (also known as bind peeking), the optimizer looks at the value in a bind variable when the database performs a hard parse of a statement.
When a query uses literals, the optimizer can use the literal values to find the best plan. However, when a query uses bind variables, the optimizer must select the best plan without the presence of literals in the SQL text. This task can be extremely difficult. By peeking at bind values the optimizer can determine the selectivity of a WHERE clause condition as if literals had been used, thereby improving the plan.
C:Oracle 11g/12guses Adaptive Cursor Sharing to solve this problem by allowing the server to compare the effectiveness of execution plans between executions with different bind variable values. If it notices suboptimal plans, it allows certain bind variable values, or ranges of values, to use alternate execution plans for the same statement. This functionality requires no additional configuration.

QUESTION 35
You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference.
Which method or feature should you use?

A.    Compare Period ADDM report
B.    AWR Compare Period report
C.    Active Session History (ASH) report
D.    Taking a new snapshot and comparing it with a preserved snapshot

Answer: B
Explanation:
The awrddrpt.sql report is the Automated Workload Repository Compare Period Report. The awrddrpt.sql script is located in the $ORACLE_HOME/rdbms/admin directory.
Incorrect:
Not A:Compare Period ADDM
Use this report to perform a high-level comparison of one workload replay to its capture or to another replay of the same capture. Only workload replays that contain at least 5 minutes of database time can be compared using this report.

QUESTION 36
You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema.
Examine the following steps:
1. Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (`SH’, `CUSTOMERS’) FROM dual statement.
2. Execute the DBMS_STATS.SEED_COL_USAGE (null, `SH’, 500) procedure.
3. Execute the required queries on the CUSTOMERS table.
4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (`SH’, `CUSTOMERS’) FROM dual statement.
Identify the correct sequence of steps.

A.    3, 2, 1, 4
B.    2, 3, 4, 1
C.    4, 1, 3, 2
D.    3, 2, 4, 1

Answer: B
Explanation:
Step1(2). Seed column usage
Oracle must observe a representative workload, in order to determine the appropriate column groups. Using the new procedure DBMS_STATS.SEED_COL_USAGE, you tell Oracle how long it should observe the workload.
Step 2: (3) You don’t need to execute all of the queries in your work during this window. You can simply run explain plan for some of your longer running queries to ensure column group information is recorded for these queries.
Step 3. (1)Create the column groups
At this point you can get Oracle to automatically create the column groups for each of the tables based on the usage information captured during the monitoring window. You simply have to call the DBMS_STATS.CREATE_EXTENDED_STATS function for each table.This function requires just two arguments, the schema name and the table name. From then on, statistics will be maintained for each column group whenever statistics are gathered on the table.
Note:
*DBMS_STATS.REPORT_COL_USAGE reports column usage information and records all the SQL operations the database has processed for a given object.
*The Oracle SQL optimizer has always been ignorant of the implied relationships between data columns within the same table. While the optimizer has traditionally analyzed the distribution of values within a column, he does not collect value-based relationships between columns. *Creating extended statisticsHere are the steps to create extended statistics for related table columns withdbms_stats.created_extended_stats:
1 – The first step is to create column histograms for the related columns.2 ?Next, we run dbms_stats.create_extended_stats to relate the columns together. Unlike a traditional procedure that is invoked via an execute (“exec”) statement, Oracle extended statistics are created via a select statement.

QUESTION 37
Which three statements are true about Automatic Workload Repository (AWR)?

A.    All AWR tables belong to the SYSTEM schema.
B.    The AWR data is stored in memory and in the database.
C.    The snapshots collected by AWR are used by the self-tuning components in the database
D.    AWR computes time model statistics based on time usage for activities, which are displayed in the
v$SYS time model and V$SESS_TIME_MODEL views.
E.    AWR contains systemwide tracing and logging information.

Answer: BCE
Explanation:
*A fundamental aspect of the workload repository is that it collects and persists database performance data in a manner that enables historical performance analysis. The mechanism for this is the AWR snapshot. On a periodic basis, AWR takes a “snapshot” of the current statistic values stored in the database instance’s memory and persists them to its tables residing in the SYSAUX tablespace.
*AWR is primarily designed to provide input to higherlevel components such as automatic tuning algorithms and advisors, but can also provide a wealth of information for the manual tuning process.

QUESTION 38
You upgraded your database from pre-12c to a multitenant container database (CDB) containing pluggable databases (PDBs).
Examine the query and its output:

clip_image002
Which two tasks must you perform to add users with SYSBACKUP, SYSDG, and SYSKM privilege to the password file?

A.    Assign the appropriate operating system groups to SYSBACKUP, SYSDG, SYSKM.
B.    Grant SYSBACKUP, SYSDG, and SYSKM privileges to the intended users.
C.    Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege and the FORCE argument
set to Yes.
D.    Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege, and FORCE arguments
set to Yes.
E.    Re-create the password file in the Oracle Database 12c format.

Answer: BD
Explanation:
*orapwd
/You can create a database password file using the password file creation utility, ORAPWD.
The syntax of the ORAPWD command is as follows:
orapwd FILE=filename [ENTRIES=numusers] [FORCE={y|n}] [ASM={y|n}] [DBUNIQUENAME=dbname] [FORMAT={12|legacy}] [SYSBACKUP={y|n}] [SYSDG={y|n}] [SYSKM={y|n}] [DELETE={y|n}] [INPUT_FILE=input-fname]
force – whether to overwrite existing file (optional),
*v$PWFILE_users
/ 12c:V$PWFILE_USERS lists all users in the password file, and indicates whether the user has been granted the SYSDBA, SYSOPER, SYSASM, SYSBACKUP, SYSDG, and SYSKM privileges.
/ 10c:sts users who have been granted SYSDBA and SYSOPER privileges as derived from the password file.
ColumnDatatypeDescription
USERNAMEVARCHAR2(30)The name of the user that is contained in the password file SYSDBAVARCHAR2(5)If TRUE, the user can connect with SYSDBA privileges SYSOPERVARCHAR2(5)If TRUE, the user can connect with SYSOPER privileges
Incorrect:
not E: The format of the v$PWFILE_users file is already in 12c format.

QUESTION 39
An application accesses a small lookup table frequently. You notice that the required data blocks are getting aged out of the default buffer cache.
How would you guarantee that the blocks for the table never age out?

A.    Configure the KEEP buffer pool and alter the table with the corresponding storage clause.
B.    Increase the database buffer cache size.
C.    Configure the RECYCLE bufferpool and alter the table with the corresponding storage clause.
D.    Configure Automata Shared Memory Management.
E.    Configure Automatic Memory Management-

Answer: A
Explanation:
Schema objects are referenced with varying usage patterns; therefore, their cache behavior may be quite different. Multiple buffer pools enable you to address these differences. You can use a KEEP buffer pool to maintain objects in the buffer cache and a RECYCLE buffer pool to prevent objects from consuming unnecessary space in the cache. When an object is allocated to a cache, all blocks from that object are placed in that cache. Oracle maintains a DEFAULT buffer pool for objects that have not been assigned to one of the buffer pools.

QUESTION 40
You conned using SQL Plus to the root container of a multitenant container database (CDB) with SYSDBA privilege.
The CDB has several pluggable databases (PDBs) open in the read/write mode.
There are ongoing transactions in both the CDB and PDBs.
What happens alter issuing the SHUTDOWN TRANSACTIONAL statement?

A.    The shutdown proceeds immediately.
The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolled hack.
B.    The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back.
C.    The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or
rolled back.
D.    The statement results in an error because there are open PDBs.

Answer: B
Explanation:
*SHUTDOWN [ABORT | IMMEDIATE | NORMAL | TRANSACTIONAL [LOCAL]]
Shuts down a currently running Oracle Database instance, optionally closing and dismounting a database. If the current database is a pluggable database, only the pluggable database is closed.
The consolidated instance continues to run.
Shutdown commands that wait for current calls to complete or users to disconnect such as SHUTDOWN NORMAL and SHUTDOWN TRANSACTIONAL have a time limit that the SHUTDOWN command will wait. If all events blocking the shutdown have not occurred within the time limit, the shutdown command cancels with the following message:
ORA-01013: user requested cancel of current operation
*If logged into a CDB, shutdown closes the CDB instance.
To shutdown a CDB or non CDB, you must be connected to the CDB or non CDB instance that you want to close, and then enter
SHUTDOWN
Database closed.
Database dismounted.
Oracle instance shut down.
To shutdown a PDB, you must log into the PDB to issue the SHUTDOWN command.
SHUTDOWN
Pluggable Database closed.
Note:
*Prerequisites for PDB Shutdown
When the current container is a pluggable database (PDB), the SHUTDOWN command can only be used if:
The current user has SYSDBA, SYSOPER, SYSBACKUP, or SYSDG system privilege.
The privilege is either commonly granted or locally granted in the PDB.
The current user exercises the privilege using AS SYSDBA, AS SYSOPER, AS SYSBACKUP, or AS SYSDG at connect time.
To close a PDB, the PDB must be open.

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QUESTION 21
Which three statements are true concerning unplugging a pluggable database (PDB)?

A.    The PDB must be open in read only mode.
B.    The PDB must be dosed.
C.    The unplugged PDB becomes a non-CDB.
D.    The unplugged PDB can be plugged into the same multitenant container database (CDB)
E.    The unplugged PDB can be plugged into another CDB.
F.    The PDB data files are automatically removed from disk.

Answer: BDE
Explanation:
B, not A:The PDB must be closed before unplugging it.
D: An unplugged PDB containsdata dictionary tables, and some of the columns in these encode information in anendianness-sensitive way. There is no supported way to handle the conversion of suchcolumns automatically. This means, quite simply, that an unplugged PDB cannot be movedacross an endianness difference.
E (not F):To exploit the new unplug/plug paradigm for patching the Oracle version most effectively,the source anddestination CDBs should share a filesystem so that the PDB’s datafiles canremain in place.

QUESTION 22
Examine the following command:
CREATE TABLE (prod_id number(4),
Prod_name varchar2 (20),
Category_id number(30),
Quantity_on_hand number (3) INVISIBLE);
Which three statements are true about using an invisible column in the PRODUCTS table?

A.    The %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column
in the output.
B.    The DESCRIBE commands in SQL *Plus will not display the invisible column in the output.
C.    Referential integrity constraint cannot be set on the invisible column.
D.    The invisible column cannot be made visible and can only be marked as unused.
E.    A primary key constraint can be added on the invisible column.

Answer: ABC
Explanation:
AB:You can make individual table columns invisible. Any generic access of a table does not show the invisible columns in the table. For example, the following operations do not display invisible columns in the output:
*SELECT * FROM statements in SQL
*DESCRIBE commands in SQL*Plus
*%ROWTYPE attribute declarations in PL/SQL
*Describes in Oracle Call Interface (OCI)
Incorrect:
Not D:You can make invisible columns visible.
You can make a column invisible during table creation or when you add a column to a table, and you can later alter the table to make the same column visible.

QUESTION 23
You wish to enable an audit policy for all database users, except SYS, SYSTEM, and SCOTT.
You issue the following statements:
SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYS;
SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYSTEM;
SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SCOTT;
For which database users is the audit policy now active?

A.    All users except SYS
B.    All users except SCOTT
C.    All users except sys and SCOTT
D.    All users except sys, system, and SCOTT

Answer: B
Explanation:
If you run multiple AUDIT statements on the same unified audit policy but specify different EXCEPT users, then Oracle Database uses the last exception user list, not any of the users from the preceding lists. This means the effect of the earlier AUDIT POLICY … EXCEPT statements are overridden by the latest AUDIT POLICY … EXCEPT statement.
Note:
*The ORA_DATABASE_PARAMETER policy audits commonly used Oracle Database parameter settings. By default, this policy is not enabled.
*You can use the keyword ALL to audit all actions.The following example shows how to audit all actions on the HR.EMPLOYEES table, except actions by user pmulligan.
Example Auditing All Actions on a Table
CREATE AUDIT POLICY all_actions_on_hr_emp_pol
ACTIONS ALL ON HR.EMPLOYEES;
AUDIT POLICY all_actions_on_hr_emp_pol EXCEPT pmulligan;

QUESTION 24
On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command:
$> sqlldr hr/hr@pdb table=employees
Which two statements are true regarding the command?

A.    It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.
B.    It fails because no SQL *Loader data file location is specified.
C.    It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.
D.    It fails because no SQL *Loader control file location is specified.

Answer: AC
Explanation:
Note:
*SQL*Loader is invoked when you specify the sqlldr command and, optionally, parameters that establish session characteristics.

QUESTION 25
After implementing full Oracle Data Redaction, you change the default value for the NUMBER data type as follows:

clip_image002
After changing the value, you notice that FULL redaction continues to redact numeric data with zero.
What must you do to activate the new default value for numeric full redaction?

A.    Re-enable redaction policies that use FULL data redaction.
B.    Re-create redaction policies that use FULL data redaction.
C.    Re-connect the sessions that access objects with redaction policies defined on them.
D.    Flush the shared pool.
E.    Restart the database instance.

Answer: E
Explanation:
About Altering the Default Full Data Redaction Value You can alter the default displayed values for full Data Redaction polices. By default, 0 is the redacted value when Oracle Database performs full redaction (DBMS_REDACT.FULL) on a column of the NUMBER data type. If you want to change it to another value (for example, 7), then you can run the DBMS_REDACT.UPDATE_FULL_REDACTION_VALUES procedure to modify this value. The modification applies to all of the Data Redaction policies in the current database instance. After you modify a value, you must restart the database for it to take effect.
Note:
*The DBMS_REDACT package provides an interface to Oracle Data Redaction, which enables you to mask (redact) data that is returned from queries issued by low-privileged users or an application.
*UPDATE_FULL_REDACTION_VALUES Procedure
This procedure modifies the default displayed values for a Data Redaction policy for full redaction.
*After you create the Data Redaction policy, it is automatically enabled and ready to redact data.
*Oracle Data Redaction enables you to mask (redact) data that is returned from queries issued by low-privileged users or applications. You can redact column data by using one of the following methods:
/Full redaction.
/Partial redaction.
/Regular expressions.
/Random redaction.
/No redaction.

QUESTION 26
You must track all transactions that modify certain tables in the sales schema for at least three years.
Automatic undo management is enabled for the database with a retention of one day.
Which two must you do to track the transactions?

A.    Enable supplemental logging for the database.
B.    Specify undo retention guarantee for the database.
C.    Create a Flashback Data Archive in the tablespace where the tables are stored.
D.    Create a Flashback Data Archive in any suitable tablespace.
E.    Enable Flashback Data Archiving for the tables that require tracking.

Answer: DE
Explanation:
E:By default, flashback archiving is disabled for any table. You can enable flashback archiving for a table if you have the FLASHBACK ARCHIVE object privilege on the Flashback Data Archive that you want to use for that table.
D:Creating a Flashback Data Archive
/Create a Flashback Data Archive with the CREATE FLASHBACK ARCHIVE statement, specifying the following:
Name of the Flashback Data Archive
Name of the first tablespace of the Flashback Data Archive
(Optional) Maximum amount of space that the Flashback Data Archive can use in the first tablespace
/Create a Flashback Data Archive named fla2 that uses tablespace tbs2, whose data will be retained for two years:
CREATE FLASHBACK ARCHIVE fla2 TABLESPACE tbs2 RETENTION 2 YEAR;

QUESTION 27
Your are the DBA supporting an Oracle 11g Release 2 database and wish to move a table containing several DATE, CHAR, VARCHAR2, and NUMBER data types, and the table’s indexes, to another tablespace.
The table does not have a primary key and is used by an OLTP application.
Which technique will move the table and indexes while maintaining the highest level of availability to the application?

A.    Oracle Data Pump.
B.    An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD to move the indexes.
C.    An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD ONLINE to move the indexes.
D.    Online Table Redefinition.
E.    Edition-Based Table Redefinition.

Answer: D
Explanation:
*Oracle Database provides a mechanism to make table structure modifications without significantly affecting the availability of the table. The mechanism is called online table redefinition. Redefining tables online provides a substantial increase in availability compared to traditional methods of redefining tables.
*To redefine a table online:
Choose the redefinition method: by key or by rowid
* By key–Select a primary key or pseudo-primary key to use for the redefinition. Pseudo-primary keys are unique keys with all component columns having NOT NULL constraints. For this method, the versions of the tables before and after redefinition should have the same primary key columns. This is the preferred and default method of redefinition.
*By rowid–Use this method if no key is available. In this method, a hidden column named M_ROW$$ is added to the post-redefined version of the table. It is recommended that this column be dropped or marked as unused after the redefinition is complete. If COMPATIBLE is set to 10.2.0 or higher, the final phase of redefinition automatically sets this column unused. You can then use the ALTER TABLE … DROP UNUSED COLUMNS statement to drop it.
You cannot use this method on index-organized tables.
Note:
*When you rebuild an index, you use an existing index as the data source. Creating an index in this manner enables you to change storage characteristics or move to a new tablespace. Rebuilding an index based on an existing data source removes intra-block fragmentation. Compared to dropping the index and using the CREATE INDEX statement, re-creating an existing index offers better performance.
Incorrect:
Not E:Edition-based redefinition enables you to upgrade the database component of an application while it is in use, thereby minimizing or eliminating down time.

QUESTION 28
To implement Automatic Management (AMM), you set the following parameters:

clip_image001
When you try to start the database instance with these parameter settings, you receive the following error message:
SQL > startup
ORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings, see alert log for more information.
Identify the reason the instance failed to start.

A.    The PGA_AGGREGATE_TARGET parameter is set to zero.
B.    The STATISTICS_LEVEL parameter is set to BASIC.
C.    Both the SGA_TARGET and MEMORY_TARGET parameters are set.
D.    The SGA_MAX_SIZE and SGA_TARGET parameter values are not equal.

Answer: B
Explanation:
Example:
SQL> startup force
ORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings ORA-00848: STATISTICS_LEVEL cannot be set to BASIC with SGA_TARGET or MEMORY_TARGET

QUESTION 29
What are two benefits of installing Grid Infrastructure software for a stand-alone server before installing and creating an Oracle database?

A.    Effectively implements role separation
B.    Enables you to take advantage of Oracle Managed Files.
C.    Automatically registers the database with Oracle Restart.
D.    Helps you to easily upgrade the database from a prior release.
E.    Enables the Installation of Grid Infrastructure files on block or raw devices.

Answer: CE
Explanation:
C: To use Oracle ASM or Oracle Restart, you must first install Oracle Grid Infrastructure
for a standalone server before you install and create the database. Otherwise, you must manually register the database with Oracle Restart.
E:
*Oracle ASM is Oracle’s recommended storage management solution that provides an alternative to conventional volume managers, file systems, and raw devices. *The Oracle Grid Infrastructure for a standalone server provides the infrastructure to include your single-instance database in an enterprise grid architecture. Oracle Database 12c combines these infrastructure products into one software installation called the Oracle Grid Infrastructure home. On a single-instance database, the Oracle Grid Infrastructure home includes Oracle Restart and Oracle Automatic Storage
Management (Oracle ASM) software.
Reference: Oracle Grid Infrastructure for a Standalone Server, Oracle Database, Installation Guide, 12c

QUESTION 30
Identify two correct statements about multitenant architectures.

A.    Multitenant architecture can be deployed only in a Real Application Clusters (RAC) configuration.
B.    Multiple pluggable databases (PDBs) share certain multitenant container database (CDB) resources.
C.    Multiple CDBsshare certain PDB resources.
D.    Multiple non-RAC CDB instances can mount the same PDB as long as they are on the same server.
E.    Patches are always applied at the CDB level.
F.    A PDB can have a private undo tablespace.

Answer: BE
Explanation:
B: Using 12c Resource manager you will be able control CPU, Exadata I/O, sessions and parallel servers. A new 12c CDB Resource Manager Plan will use so-called “Shares” (resource allocations) to specify how CPU is distributed between PDBs. A CDB Resource Manager Plan also can use “utilization limits” to limit the CPU usage for a PDB. With a default directive, you do not need to modify the resource plan for each PDB plug and unplug.
E: New paradigms for rapid patching and upgrades. The investment of time and effort to patch one multitenant container database results in patching all of its many pluggable databases. To patch a single pluggable database, you simply unplug/plug to a multitenant container database at a different Oracle Database software version.
Incorrect:
Not A:
*The Oracle RAC documentation describes special considerations for a CDB in an Oracle
RAC environment.
* Oracle Multitenant is a new option for Oracle Database 12c Enterprise Edition that helps customers reduce IT costs by simplifying consolidation, provisioning, upgrades, and more. It is supported by a new architecture that allows a container database to hold many pluggable databases. And it fully complements other options, including Oracle Real Application Clusters and Oracle Active Data Guard. An existing database can be simply adopted, with no change, as a pluggable database; and no changes are needed in the other tiers of the application.
Not D: You can unplug a PDB from one CDB and plug it into a different CDB without altering your schemas or applications. A PDB can be plugged into only one CDB at a time.
not F:
*UNDO tablespace can NOT be local and stays on the CDB level.
* Redo and undo go hand in hand, and so the CDB as a whole has a single undo tablespace per RAC instance.

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QUESTION 11
Your multitenant container database (CDB) contains three pluggable database (PDBs). You find that the control file is damaged. You plan to use RMAN to recover the control file. There are no startup triggers associated with the PDBs.
Which three steps should you perform to recover the control file and make the database fully operational?

A.    Mount the container database (CDB) and restore the control file from the control file auto backup.
B.    Recover and open the CDB in NORMAL mode.
C.    Mount the CDB and then recover and open the database, with the RESETLOGS option.
D.    Open all the pluggable databases.
E.    Recover each pluggable database.
F.    Start the database instance in the nomount stage and restore the control file from control file auto backup.

Answer: CDF
Explanation:
Step 1: F
Step 2: D
Step 3: C: If all copies of the current control file are lost or damaged, then you must restore and mount a backup control file. You must then run the RECOVERcommand, even if no data files have been restored, and open the database with the RESETLOGS option.
Note:
*RMAN and Oracle Enterprise Manager Cloud Control (Cloud Control) provide full support for backup and recovery in a multitenant environment. You can back up and recover a whole multitenant container database (CDB), root only, or one or more pluggable databases (PDBs).

QUESTION 12
A new report process containing a complex query is written, with high impact on the database. You want to collect basic statistics about query, such as the level of parallelism, total database
time, and the number of I/O requests.
For the database instance STATISTICS_LEVEL, the initialization parameter is set to TYPICAL and the CONTROL_MANAGEMENT_PACK_ACCESS parameter is set to DIAGNOSTIC+TUNING.
What should you do to accomplish this task?

A.    Execute the query and view Active Session History (ASH) for information about the query.
B.    Enable SQL trace for the query.
C.    Create a database operation, execute the query, and use the DBMS_SQL_MONITOR.REPORT_SQL_
MONITOR function to view the report.
D.    Use the DBMS_APPLICATION_INFO.SET_SESSION_LONGOPS procedure to monitor query execution
and view the information from the V$SESSION_LONGOPS view.

Answer: C
Explanation:
The REPORT_SQL_MONITOR function is used to return a SQL monitoring report for a specific SQL statement.
Incorrect:
Not A: Not interested in session statistics, only in statistics for the particular SQL query.
Not B: We are interested in statistics, not tracing.
Not D:SET_SESSION_LONGOPS Procedure
This procedure sets a row in the V$SESSION_LONGOPS view. This is a view that is used to indicate the on-going progress of a long running operation. Some Oracle functions, such as parallel execution and Server Managed Recovery, use rows in this view to indicate the status of, for example, a database backup.
Applications may use the SET_SESSION_LONGOPS procedure to advertise information on the progress of application specific long running tasks so that the progress can be monitored by way of the V$SESSION_LONGOPS view.

QUESTION 13
Identify three valid options for adding a pluggable database (PDB) to an existing multitenant container database (CDB).

A.    Use the CREATE PLUGGABLE DATABASE statement to create a PDB using the files from the SEED.
B.    Use the CREATE DATABASE . . . ENABLE PLUGGABLE DATABASE statement to provision a PDB by
copying file from the SEED.
C.    Use the DBMS_PDB package to clone an existing PDB.
D.    Use the DBMS_PDB package to plug an Oracle 12c non-CDB database into an existing CDB.
E.    Use the DBMS_PDB package to plug an Oracle 11 g Release 2 (11.2.0.3.0) non-CDB database into an
existing CDB.

Answer: ACD
Explanation:
Use the CREATE PLUGGABLE DATABASE statement to create a pluggable database (PDB).
This statement enables you to perform the following tasks:
* (A)Create a PDB by using the seed as a template
Use the create_pdb_from_seed clause to create a PDB by using the seed in the multitenant container database (CDB) as a template. The files associated with the seed are copied to a new location and the copied files are then associated with the new PDB.
* (C)Create a PDB by cloning an existing PDB
Use the create_pdb_clone clause to create a PDB by copying an existing PDB (the source PDB) and then plugging the copy into the CDB. The files associated with the source PDB are copied toa new location and the copied files are associated with the new PDB. This operation is called cloning a PDB.
The source PDB can be plugged in or unplugged. If plugged in, then the source PDB can be in the same CDB or in a remote CDB. If the source PDB is in a remote CDB, then a database link is used to connect to the remote CDB and copy the files.
*Create a PDB by plugging an unplugged PDB or a non-CDB into a CDB
Use the create_pdb_from_xml clause to plug an unplugged PDB or a non-CDB into a CDB, using an XML metadata file.

QUESTION 14
Your database supports a DSS workload that involves the execution of complex queries:
Currently, the library cache contains the ideal workload for analysis. You want to analyze some of the queries for an application that are cached in the library cache.
What must you do to receive recommendations about the efficient use of indexes and materialized views to improve query performance?

A.    Create a SQL Tuning Set (STS) that contains the queries cached in the library cache and run the SQL
Tuning Advisor (STA) on the workload captured in the STS.
B.    Run the Automatic Workload Repository Monitor (ADDM).
C.    Create an STS that contains the queries cached in the library cache and run the SQL Performance Analyzer
(SPA) on the workload captured in the STS.
D.    Create an STS that contains the queries cached in the library cache and run the SQL Access Advisor on
the workload captured in the STS.

Answer: D
Explanation:
*SQL Access Advisor is primarily responsible for making schema modification recommendations, such as adding or dropping indexes and materialized views. SQL Tuning Advisor makes other types of recommendations, such as creating SQL profiles and restructuring SQL statements.
*The query optimizer can also help you tune SQL statements. By using SQL Tuning Advisor and SQL Access Advisor, you can invoke the query optimizer in advisory mode to examine a SQL statement or set of statements and determine how to improve their efficiency. SQL Tuning Advisor and SQL Access Advisor can make various recommendations, such as creating SQL profiles, restructuring SQL statements, creating additional indexes or materialized views, and refreshing optimizer statistics.
Note:
* Decision support system (DSS) workload
*The library cache is a shared pool memory structure that stores executable SQL and PL/SQL code. This cache contains the shared SQL and PL/SQL areas and control structures such as locks and library cache handles.

QUESTION 15
The following parameter are set for your Oracle 12c database instance:
OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES=FALSE
OPTIMIZER_USE_SQL_PLAN_BASELINES=TRUE
You want to manage the SQL plan evolution task manually. Examine the following steps:
1. Set the evolve task parameters.
2. Create the evolve task by using the DBMS_SPM.CREATE_EVOLVE_TASK function.
3. Implement the recommendations in the task by using the DBMS_SPM.IMPLEMENT_EVOLVE_TASK function.
4. Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function.
5. Report the task outcome by using the DBMS_SPM.REPORT_EVOLVE_TASK function.
Identify the correct sequence of steps:

A.    2, 4, 5
B.    2, 1, 4, 3, 5
C.    1, 2, 3, 4, 5
D.    1, 2, 4, 5

Answer: B
Explanation:
*Evolving SQL Plan Baselines

clip_image001
2.Create the evolve task by using the DBMS_SPM.CREATE_EVOLVE_TASK function. This function creates an advisor task to prepare the plan evolution of one or more plans for a specified SQL statement. The input parameters can be a SQL handle, plan name or a list of plan names, time limit, task name, and description.
1.Set the evolve task parameters.
SET_EVOLVE_TASK_PARAMETER
This function updates the value of an evolve task parameter. In this release, the only valid parameter is TIME_LIMIT.
4.Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function. This function executes an evolution task. The input parameters can be the task name, execution name, and execution description. If not specified, the advisor generates the name, which is returned by the function.
3:IMPLEMENT_EVOLVE_TASK
This function implements all recommendations for an evolve task. Essentially, this function is equivalent to using ACCEPT_SQL_PLAN_BASELINE for all recommended plans. Input parameters include task name, plan name, owner name, and execution name. 5.Report the task outcome by using the DBMS_SPM_EVOLVE_TASK function. This function displays the results of an evolve task as a CLOB. Input parameters include the task name and section of the report to include.

QUESTION 16
In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.
On further investigation, you find that buffer busy waits is caused by contention on data blocks.
Which option would you consider first to decrease the wait event immediately?

A.    Decreasing PCTUSED
B.    Decreasing PCTFREE
C.    Increasing the number of DBWNprocess
D.    Using Automatic Segment Space Management (ASSM)
E.    Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation

Answer: D
Explanation:
*Automatic segment space management (ASSM) is a simpler and more efficient way of managing space within a segment. It completely eliminates any need to specify and tune the pctused,freelists, and freelist groups storage parameters for schema objects created in the tablespace. If any of these attributes are specified, they are ignored. *Oracle introduced Automatic Segment Storage Management (ASSM) as a replacement for traditional freelists management which used one-way linked-lists to manage free blocks with tables and indexes. ASSM is commonly called “bitmap freelists” because that is how Oracle implement the internal data structures for free block management.
Note:
* Buffer busy waits are most commonly associated with segment header contention onside the data buffer pool (db_cache_size, etc.).
*The most common remedies for high buffer busy waits include database writer (DBWR) contention tuning, adding freelists (or ASSM), and adding missing indexes.

QUESTION 17
Examine this command:
SQL > exec DBMS_STATS.SET_TABLE_PREFS (`SH’, `CUSTOMERS’, `PUBLISH’, `false’);
Which three statements are true about the effect of this command?

A.    Statistics collection is not done for the CUSTOMERS table when schema stats are gathered.
B.    Statistics collection is not done for the CUSTOMERS table when database stats are gathered.
C.    Any existing statistics for the CUSTOMERS table are still available to the optimizer at parse time.
D.    Statistics gathered on the CUSTOMERS table when schema stats are gathered are stored as pending statistics.
E.    Statistics gathered on the CUSTOMERS table when database stats are gathered are stored as pending statistics.

Answer: ACD
Explanation:
*SET_TABLE_PREFS Procedure
This procedure is used to set the statistics preferences of the specified table in the specified schema.
*Example:
Using Pending Statistics
Assume many modifications have been made to the employees table since the last time statistics were gathered. To ensure that the cost-based optimizer is still picking the best plan, statistics should be gathered once again; however, the user is concerned that new statistics will cause the optimizer to choose bad plans when the current ones are acceptable. The user can do the following:
EXEC DBMS_STATS.SET_TABLE_PREFS(‘hr’, ’employees’, ‘PUBLISH’, ‘false’);
By setting the employees tables publish preference to FALSE, any statistics gather from now on will not be automatically published. The newly gathered statistics will be marked as pending.

QUESTION 18
Examine the following impdp command to import a database over the network from a pre-12c Oracle database (source):

clip_image002
Which three are prerequisites for successful execution of the command?

A.    The import operation must be performed by a user on the target database with the
DATAPUMP_IMP_FULL_DATABASE role, and the database link must connect to a user on the source
database with the DATAPUMP_EXD_FULL_DATABASE role.
B.    All the user-defined tablespaces must be in read-only mode on the source database.
C.    The export dump file must be created before starting the import on the target database.
D.    The source and target database must be running on the same platform with the same endianness.
E.    The path of data files on the target database must be the same as that on the source database.
F.    The impdp operation must be performed by the same user that performed the expdp operation.

Answer: BCE
Explanation:
* Be aware of the following general limitations as you plan to transport data:
/ The source and the target databases must use compatible database character sets.
C: You can use the full transportable export/import feature to copy an entire database from one Oracle Database instance to another. You can use Data Pump to produce an export dump file, transport the dump file to the target database if necessary, and then import the export dump file. Alternatively, you can use Data Pump to copy the database over the network.
B, Not D: Transporting a Database Using an Export Dump File The following list of tasks summarizes the process of transporting a database using an export dump file.

QUESTION 19
Which two are true concerning a multitenant container database with three pluggable database?

A.    All administration tasks must be done to a specific pluggable database.
B.    The pluggable databases increase patching time.
C.    The pluggable databases reduce administration effort.
D.    The pluggable databases are patched together.
E.    Pluggable databases are only used for database consolidation.

Answer: CDE
Explanation:
The benefits of Oracle Multitenant are brought by implementing a pure deployment choice. The following list calls out the most compelling examples.
*High consolidation density.(E)
The many pluggable databases in a single multitenant container database share its memory and background processes, letting you operate many more pluggable databases on a particular platform than you can single databases that use the old architecture. This is the same benefit that schema-based consolidation brings.
*Rapid provisioning and cloning using SQL.
*New paradigms for rapid patching and upgrades.(D, not B) The investment of time and effort to patch one multitenant container database results in patching all of its many pluggable databases. To patch a single pluggable database, you simply unplug/plug to a multitenant container database at a different Oracle Database software version.
* (C, not A)Manage many databases as one.
By consolidating existing databases as pluggable databases, administrators can manage many databases as one. For example, tasks like backup and disaster recovery are performed at the multitenant container database level.
*Dynamic between pluggable database resource management. In Oracle Database 12c, Resource Manager is extended with specific functionality to control the competition for resources between the pluggable databases within a multitenant container database.
Note:
*Oracle Multitenantis a new option for Oracle Database 12c Enterprise Edition that helps customers reduce IT costs by simplifying consolidation, provisioning, upgrades, and more. It is supported by a new architecture that allows a multitenant container database to hold many pluggable databases. And it fully complements other options, including Oracle Real Application Clusters and Oracle Active Data Guard. An existing database can be simply adopted, with no
change, as a pluggable database; and no changes are needed in the other tiers of the application.

QUESTION 20
Examine the current value for the following parameters in your database instance:
SGA_MAX_SIZE = 1024M
SGA_TARGET = 700M
DB_8K_CACHE_SIZE = 124M
LOG_BUFFER = 200M
You issue the following command to increase the value of DB_8K_CACHE_SIZE:
SQL> ALTER SYSTEM SET DB_8K_CACHE_SIZE=140M;
Which statement is true?

A.    It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically.
B.    It succeeds only if memory is available from the autotuned components if SGA.
C.    It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET.
D.    It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_MAX_SIZE.

Answer: D
Explanation:
*The SGA_TARGET parameter can be dynamically increased up to the value specified for the SGA_MAX_SIZE parameter, and it can also be reduced.
* Example:
For example, suppose you have an environment with the following configuration:
SGA_MAX_SIZE = 1024M
SGA_TARGET = 512M
DB_8K_CACHE_SIZE = 128M
In this example, the value of SGA_TARGET can be resized up to 1024M and can also be reduced until one or more of the automatically sized components reaches its minimum size. The exact value depends on environmental factors such as the number of CPUs on the system. However, the value of DB_8K_CACHE_SIZE remains fixed at all times at 128M
*DB_8K_CACHE_SIZE
Size of cache for 8K buffers
* For example, consider this configuration:
SGA_TARGET = 512M
DB_8K_CACHE_SIZE = 128M
In this example, increasing DB_8K_CACHE_SIZE by 16 M to 144M means that the 16M is taken away from the automatically sized components. Likewise, reducing DB_8K_CACHE_SIZE by 16M to 112M means that the 16M is given to the automatically sized components.

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QUESTION 1
You notice that the performance of your production 24/7 Oracle database significantly degraded. Sometimes you are not able to connect to the instance because it hangs. You do not want to restart the database instance.
How can you detect the cause of the degraded performance?

A.    Enable Memory Access Mode, which reads performance data from SGA.
B.    Use emergency monitoring to fetch data directly from SGA analysis.
C.    Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic
Workload Repository (AWR) snapshots.
D.    Use Active Session History (ASH) data and hang analysis in regular performance monitoring.
E.    Run ADDM in diagnostic mode.

Answer: C

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At the end of iteration phase, during Project Execution and Control, which three key tasks should
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