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Oracle Database 19c Performance and Tuning Management Sample Questions:

1. Which two statements are true about cursor sharing?

A) Setting cursor_sharing to EXACT prevents Adaptive Cursor Sharing from being used.
B) Setting Cursor_sharing to FORCE can result in a plan that is suboptimal for the majority of values bound to a bind variable when executing a cursor with one or more bind variables.
C) Adaptive Cursor Sharing requires histograms on filtered columns, used in equality predicates, to allow different execution plans to be generated for statements whose bound values would normally generate different plans at hard parse time.
D) Adaptive Cursor Sharing guarantees that a suboptimal plan will never be used on any execution of a SQL statement.
E) Setting optimizer_capture_sql_plan_baselines to TRUE loads all adaptive plans for the same statement into the cursor cache.

2. You need to collect and aggregate statistics for the ACCTG service and PAYROLL module, and execute:

Where do you find the output of this command?

A) By viewing V$SERVICE_STATS
B) In the current working directory
C) In $ORACLE_BASE/diag/rdbms/<db unique name>/<instance name>/trace
D) By viewing V$SERV_MOD_ACT_STATS

3. Which two statements are true about space usage in temporary tablespaces?

A) When a global temporary table instantiation is too large to fit in memory, space is allocated in a temporary tablespace.
B) A sort will fail if a sort to disk requires more disk space and no additional extent can be found/allocated in/for the sort segment.
C) Temporary tablespaces setting Includes quotas to limit temporary space used by a session for that Temporary tablespace.
D) Lack of temporary tablespace space for sort operations can be prevented by using temporary tablespace groups.
E) When a session consumes all temporary tablespace storage, then the session would hang until the temporary space used by that session is cleared.

4. Examine this command:

What is the maximum number of baselines generated by this command that you can have at any given time?

A) 1
B) 5
C) 52
D) 3

5. Which application lifecycle phase could be managed reactively?

A) Deployment
B) Testing
C) Upgrade or migration
D) Production
E) Design and development

Solutions:

Question # 1 Answer: A,B

Question # 2 Answer: D

Question # 3 Answer: A,D

Question # 4 Answer: C

Question # 5 Answer: D