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QUESTION NO:27

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

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Correct Answer: B

Explanation

Explanation/Reference:

* Evolving SQL Plan Baselines

*

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.

Reference: Oracle Database SQL Tuning Guide 12c, Managing SQL Plan Baselines

QUESTION NO:109

Which three activities are supported by the Data Recovery Advisor?

A. Advising on block checksum failures

B. Advising on inaccessible control files

C. Advising on inaccessible block change tracking files

D. Advising on empty password files

E. Advising on invalid block header field values

Correct Answer: ABE

Explanation

Explanation/Reference:

* Data Recovery Advisor can diagnose failures such as the following:

/ (B) Components such as datafiles and control files that are not accessible because they do not exist, do

not have the correct access permissions, have been taken offline, and so on

/ (A, E) Physical corruptions such as block checksum failures and invalid block header field values

/ Inconsistencies such as a datafile that is older than other database files

/ I/O failures such as hardware errors, operating system driver failures, and exceeding operating system

resource limits (for example, the number of open files)

* The Data Recovery Advisor automatically diagnoses corruption or loss of persistent data on disk,

determines the appropriate repair options, and executes repairs at the user’s request. This reduces the

complexity of recovery process, thereby reducing the Mean Time To Recover (MTTR).

QUESTION NO:12

The hr user receiver, the following error while inserting data into the sales table:

ERROR at line 1:

ORA-01653; unable to extend table HR.SALES by 128 in tablespace USERS

On investigation, you find that the users tablespace uses Automnrif Segment Space Management (ASSM).

It is the default tablespace for the HR user with an unlimited quota on it.

Which two methods would you use to resolve this error?

A. Altering the data life associated with the USERS tablespace to ex automatically

B. Adding a data life to the USERS tablespace

C. Changing segment space management for the USERS tablespace to manual

D. Creating a new tablespace with autoextend enabled and changing the default tablespace of the HR

user to the new tablespace

E. Enabling resumable space allocation by setting the RESUMABLE_TIMEOUT parameter to a nonzero

value

Correct Answer: AD

Explanation

Explanation/Reference:

QUESTION NO:20

Examine the memory-related parameters set in the SPFILE of an Oracle database:

memory_max_target–6G

memory_target=5G

pga_aggregate_target=500M

sga_max_size=0

sga_target=0

Which statement is true?

A. Only SGA components are sized automatically-

B. Memory is dynamically re-allocated between the SGA and PGA as needed.

C. The size of the PGA cannot grow automatically beyond 500 MB.

D. The value of the MEMORY_TARGET parameter cannot be changed dynamically.

Correct Answer: C

Explanation

Explanation/Reference:

QUESTION NO:55

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

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C. SQL Access Advisor

D. SQL Performance Analyzer

E. Automatic Workload Repository compare reports

Correct Answer: D

Explanation

Explanation/Reference:

You can use the SQL Performance Analyzer to analyze the SQL performance impact of any type of system

change. Examples of common system changes include:

QUESTION NO:105

Examine the details of the Top 5 Timed Events in the following Automatic Workloads Repository (AWR)

report:

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What are three possible causes for the latch-related wait events?

A. The size of the shared pool is too small.

B. Cursors are not being shared.

C. A large number COMMITS are being performed.

D. There are frequent logons and logoffs.

E. The buffers are being read into the buffer cache, but some other session is changing the buffers.

Correct Answer: ABE

Explanation

Explanation/Reference:

QUESTION NO:67

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.

Correct Answer: B

Explanation

Explanation/Reference:

* 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 NO:95

Identify three scenarios in which you would recommend the use of SQL Performance Analyzer to analyze

impact on the performance of SQL statements.

A. Change in the Oracle Database version

B. Change in your network infrastructure

C. Change in the hardware configuration of the database server

D. Migration of database storage from non-ASM to ASM storage

E. Database and operating system upgrade

Correct Answer: ACE

Explanation

Explanation/Reference:

Oracle 11g/12c makes further use of SQL tuning sets with the SQL Performance Analyzer, which

compares the performance of the statements in a tuning set before and after a database change. The

database change can be as major or minor as you like, such as:

* (E) Database, operating system, or hardware upgrades.

* (A,C) Database, operating system, or hardware configuration changes.

* Database initialization parameter changes.

* Schema changes, such as adding indexes or materialized views.

* Refreshing optimizer statistics.

* Creating or changing SQL profiles.

QUESTION NO:104

You are connected using SQL* Plus to a multitenant container database (CDB) with SYSDBA privileges

and execute the following sequence statements:

What is the result of the last SET CONTAINER statement and why is it so?

A. It succeeds because the PDB_ADMIN user has the required privileges.

B. It fails because common users are unable to use the SET CONTAINER statement.

C. It fails because local users are unable to use the SET CONTAINER statement.

D. If fails because the SET CONTAINER statement cannot be used with PDB$SEED as the target

pluggable database (PDB).

Correct Answer: C

Explanation

Explanation/Reference:

QUESTION NO:103

Which three operations can be performed as multipartition operations in Oracle?

A. Merge partitions of a list partitioned table

B. Drop partitions of a list partitioned table

C. Coalesce partitions of a hash-partitioned global index.

D. Move partitions of a range-partitioned table

E. Rename partitions of a range partitioned table

F. Merge partitions of a reference partitioned index

Correct Answer: ABF

Explanation

Explanation/Reference:

Multipartition maintenance enables adding, dropping, truncate, merge, split operations on multiple

partitions.

A: Merge Multiple Partitions:

The new “ALTER TABLE … MERGE PARTITIONS ” help merge multiple partitions or subpartitions with a

single statement. When merging multiple partitions, local and global index operations and semantics for

inheritance of unspecified physical attributes are the same for merging two partitions.

B: Drop Multiple Partitions:

The new “ALTER TABLE … DROP PARTITIONS ” help drop multiple partitions or subpartitions with a

single statement.

Example:

view plaincopy to clipboardprint?

SQL> ALTER TABLE Tab_tst1 DROP PARTITIONS

Tab_tst1_PART5, Tab_tst1_PART6, Tab_tst1_PART7;

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Table altered

SQL>

Restrictions :

-You can’t drop all partitions of the table.

-If the table has a single partition, you will get the error: ORA-14083: cannot drop the only partition of a

partitioned.

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