Free Access Oracle.1Z0-083.v2025-05-02.q283 Practice Test (Page 50)

Question 241

Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

A.The number of table rows is considered when evaluating the cost of accessing a table using an index.

B.Index balanced B*Tree height is considered when evaluating the cost of using an index.

C.The Statistics Advisor can help recommend the best way to gather statistics.

D.Statistics collected using DBMS_STATS always yield the best optimizer result.

E.The Statistics Advisor generates actions for all recommendations.

Question 242

How do you configure a CDB for local undo mode?

A.Open the CDB instance in upgrade mode.
In cdb$root, execute alter database local undo on, and then restart the CDB instance.

B.Open the CDB in read-only mode.
In cdb$root, ex cute alter database local undo on, and then change the CDB to read/write mode.

C.Open the CDB instance in restricted mode.
In cdb$root, execute alter database local undo on.
create an undo tablespace in each PDB, and hen restart the CDB instance

D.Open the CDB instance in restricted mode.
In cdb$root, drop the undo tablespace.
Execute alter database local undo on in each PDB and then restart the CDB instance.

E.Open the CDB instance in upgrade mode.
In each PDB, execute alter database local undo on, create an undo tablespace, and hen restart the CDB instance.

Question 243

Which two are true about data movement between a non-CDB and a PDB using Data Pump? (Choose two.)

A.Moving data from a non-CDB to a PDB is only possible by using conventional export and import.

B.Oracle attempts to convert common users to conventional users when moving schemas from a PDB to a non-CDB.

C.A new PDB is automatically created when importing a non-CDB into a CDB.

D.Tablespaces are automatically created as neeed while importing full exports in either a non-CDB or a PDB.

E.Oracle attempts to convert conventional database users to local users when moving schemas from a non- CDB to a PDB.

F.Moving data from a PDB to a non-CDB is only possible by using transportable tablespace export and import.

Question 244

Choose two. Which two are true about RMAN persistent configuration settings, administration, and their effects?

A.A DBA must specify either a redundancy retention policy or a recovery window retention policy. B)A target database's persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.

B.A target database's persistent RMAN configuration settings are always stored in the target's control file.

C.Backups written to the fast recovery area (FRA) that are obsolete based on the redundancy retention policy can be deleted automatically to free space.

D.Backups older than the recovery window retention policy are always deleted automatically if the backup location has insufficient space.

Question 245

Automatic Shared Memory Management is disabled for one of your database instances.
Some SQL statements perform poorly due to excessive hard parse activity, thereby degrading performance.
What would be your next step?

A.Run the SQL Access Advisor.

B.Run the Memory Advisor for the shared pool.

C.Run the SQL Tunning Advisor.

D.Run the Memory Advisor for the Program Global Area.

E.Run the Memory Advisor for the System Global Area.

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Question 241

Question 242

Question 243

Question 244

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