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Q21. 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: D

Q22. A senior DBA asked you to execute the following command to improve performance: SQL> ALTER TABLE subscribe log STORAGE (BUFFER_POOL recycle);

You checked the data in the SUBSCRIBE_LOG table and found that it is a large table containing one million rows.

What could be a reason for this recommendation?

A. The keep pool is not configured. 

B. Automatic Workarea Management is not configured. 

C. Automatic Shared Memory Management is not enabled. 

D. The data blocks in the SUBSCRIBE_LOG table are rarely accessed. 

E. All the queries on the SUBSCRIBE_LOG table are rewritten to a materialized view.

Answer: D

Q23. 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

Q24. Which two statements are true when row archival management is enabled?

A. The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.

B. The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.

C. The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.

D. The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.

E. The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Server based on activity tracking columns, to Indicate that a row is no longer considered active.

Answer: CD

Q25. 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


Abreast of the times 1z0-060 study guide:

Q26. You administer an online transaction processing (OLTP) system whose database is stored in Automatic Storage Management (ASM) and whose disk group use normal redundancy.

One of the ASM disks goes offline, and is then dropped because it was not brought online before DISK_REPAIR_TIME elapseD. 

When the disk is replaced and added back to the disk group, the ensuing rebalance operation is too slow.

Which two recommendations should you make to speed up the rebalance operation if this type of failure happens again?

A. Increase the value of the ASM_POWER_LIMIT parameter.

B. Set the DISK_REPAIR_TIME disk attribute to a lower value.

C. Specify the statement that adds the disk back to the disk group.

D. Increase the number of ASMB processes.

E. Increase the number of DBWR_IO_SLAVES in the ASM instance.

Answer: AC

Q27. You create a table with the PERIOD FOR clause to enable the use of the Temporal Validity feature of Oracle Database 12C. 

Examine the table definition:

Which three statements are true concerning the use of the Valid Time Temporal feature for the EMPLOYEES table?

A. The valid time columns employee_time_start and employee_time_end are automatically created. 

B. The same statement may filter on both transaction time and valid temporal time by using the AS OF TIMESTAMP and PERIOD FOR clauses.

C. The valid time columns are not populated by the Oracle Server automatically.

D. The valid time columns are visible by default when the table is described. 

E. Setting the session valid time using DBMS_FLASHBACK_ARCHIVE.ENABLE_AT_VALID_TIME sets the visibility for data manipulation language (DML), data definition language (DDL), and queries performed by the session.

Answer: ABE

Q28. Your database is open and the LISTENER listener running. You stopped the wrong listener LISTENER by issuing the following command:

1snrctl > STOP

What happens to the sessions that are presently connected to the database Instance?

A. They are able to perform only queries.

B. They are not affected and continue to function normally.

C. They are terminated and the active transactions are rolled back.

D. They are not allowed to perform any operations until the listener LISTENER is started. 

Answer: B

Q29. Which three statements are true when the listener handles connection requests to an Oracle 12c database instance with multithreaded architecture enabled In UNIX?

A. Thread creation must be routed through a dispatcher process

B. The local listener may spawn a now process and have that new process create a thread

C. Each Oracle process runs an SCMN thread. 

D. Each multithreaded Oracle process has an SCMN thread. 

E. The local listener may pass the request to an existing process which in turn will create a thread. 

Answer: ADE

Q30. 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