Free Access Oracle.1Z0-083.v2022-02-19.q163 Practice Test (Page 29)

Question 136

Which statement correctly describes the SQL profiling performed by the SQL Tuning Advisor?

A.It is a set of recommendations by the optimizer to create new indexes.

B.It is auxiliary information collected by the optimizer for a SQL statement to eliminate estimation error.

C.It is a set of recommendations by the optimizer to change the access methods used.

D.It is auxiliary information collected by the optimizer for a SQL statement to help use better joins orders.

E.It is a set of recommendations by the optimizer to restructure a SQL statement to avoid suboptimal execution plans.

Question 137

Which three are true about thresholds, metrics, and server-generated alerts? (Choose three.)

A.All metrics are instance related.

B.Cleared stateful alerts are displayed by querying DBA_ALERT_HISTORY.

C.A space usage management alert is automatically cleared after the underlying problem is resolved.

D.They are generated by SMON when a tablespace is 97% full.

E.Metrics are statistical counts for a specific unit.

F.STATISTICS_LEVELmust be set to ALLto generate alerts.

Question 138

Which three are true about the SQL Tuning Advisor? (Choose three.)

A.It can recommend semantic changes to SQL statements.

B.It checks each query being analyzed for stale statistics.

C.It builds SQL profiles for each poorly performing SQL statement to prevent regressions.

D.It checks each query being analyzed for missing statistics.

E.It only recommends syntactic changes to SQL statements.

F.It considers all SQL statements being analyzed by the advisor task as a group.

Question 139

Which three are true about upgrading Oracle Grid Infrastructure? (Choose three.)

A.A direct upgrade can be performed only from the immediately preceding Oracle Grid Infrastructure version.

B.The newer version is installed in a separate Oracle Grid Infrastructure home on the same server as the existing version.

C.An existing Oracle base can be used.

D.The upgrade process will automatically install all mandatory patches for the current version of Oracle Grid Infrastructure.

E.Existing Oracle Database instances must be shut down before starting the upgrade.

F.Only the grid user can perform the upgrade.

Question 140

Examine these queries and their output:

An online RMAN backup of the CDB was taken an hour before Restore Point ri was created.
You want to recover PDB1 to Restore Point R1.
How do you achieve this?

A.Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to PDB1.

B.Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to CDB$ROOT.

C.Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to PDB1.

D.This cannot be done due to the lack of a clean restore point.

E.Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to CDB$ROOT.

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