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Q21. 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


Q22. Which Oracle Database component is audited by default if the unified Auditing option is enabled?

A. Oracle Data Pump

B. Oracle Recovery Manager (RMAN)

C. Oracle Label Security

D. Oracle Database Vault

E. Oracle Real Application Security

Answer: B


Q23. 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 a SQL statement

Answer: ACE


Q24. To implement Automatic Management (AMM), you set the following parameters:

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:


Q25. Which three tasks can be automatically performed by the Automatic Data Optimization feature of Information lifecycle Management (ILM)?

A. Tracking the most recent read time for a table segment in a user tablespace

B. Tracking the most recent write time for a table segment in a user tablespace

C. Tracking insert time by row for table rows

D. Tracking the most recent write time for a table block

E. Tracking the most recent read time for a table segment in the SYSAUX tablespace

F. Tracking the most recent write time for a table segment in the SYSAUX tablespace

Answer: ABD 


Q26. On your Oracle Database, you issue the following commands to create indexes:

SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customer_id, sales_rep_id) INVISIBLE;

SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customer_id, sales_rep_id);

Which two statements are true?

A. Only the ORD_CUSTOMER_IX1 index created. 

B. Both the indexes are updated when a row is inserted, updated, or deleted in the ORDERS table.

C. Both the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table.

D. The ORD_CUSTOMER_IX1 index is not used by the optimizer even when the OPTIMIZER_USE_INVISIBLE_INDEXES parameters is set to true.

E. Both the indexes are created and used by the optimizer for queries on the ORDERS table.

F. Both the indexes are created: however, only ORD_CUSTOMERS_IX2 is used by the optimizer for queries on the ORDERS table.

Answer: BF


Q27. Which two statements are true about the RMAN validate database command?

A. It checks the database for intrablock corruptions.

B. It can detect corrupt pfiles.

C. It can detect corrupt spfiles.

D. It checks the database for interblock corruptions.

E. It can detect corrupt block change tracking files.

Answer: AC


Q28. You notice that the elapsed time for an important database scheduler Job is unacceptably long.

The job belongs to a scheduler job class and window. Which two actions would reduce the job's elapsed time?

A. Increasing the priority of the job class to which the job belongs

B. Increasing the job's relative priority within the Job class to which it belongs

C. Increasing the resource allocation for the consumer group mapped to the scheduler job's job class within the plan mapped to the scheduler window

D. Moving the job to an existing higher priority scheduler window with the same schedule and duration

E. Increasing the value of the JOB_QUEUE_PROCESSES parameter

F. Increasing the priority of the scheduler window to which the job belongs

Answer: CF


Q29. 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 buffer pool and alter the table with the corresponding storage clause.

D. Configure Automata Shared Memory Management.

E. Configure Automatic Memory Management-

Answer: A


Q30. 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