Free Access Oracle.1Z0-083.v2024-11-13.q152 Practice Test (Page 31)

Question 146

Which three are true about the Oracle Optimizer? (Choose three.)

A.It obeys all hints.

B.It considers the filters in WHERE clauses when generating execution plans for SQL statements.

C.It can re-optimize execution plans after previous executions detect suboptimal plans.

D.It considers object statistics when generating execution plans for SQL statements.

E.It updates stale object statistics in the Data Dictionary.

F.It can only use SQL Plan Directives tied to the SQL statement for which a plan is being generated.

Question 147

Which three are true about recovery operations done without using Recovery Manager (RMAN)?
(Choose three.)

A.A lost SPFILE can be recovered from memory using SQL*PLUS.

B.A lost password file can be re-created with SQL*PLUS.

C.A lost TEMPFILE must always be re-created manually.

D.A lost password file can be manually re-created with the orapwd utility.

E.A lost PFILE can be re-created alert.log using SQL*PLUS.

F.A lost index tablespace can be re-created without performing any recovery.

Question 148

Which two are true about flashback features in Oracle Database 19c and later releases?

A.Flashback logs are automatically purged whenever the value
Of DB_FLASHBACK_RETENTION_TARGET is changed.

B.Flashback logs are monitored for being older than the retention period defined in db_flashback_retention_target and can be deleted by an administrator written event trigger.

C.Flashback logs are automatically purged when db_flashback_retention_target is set lower than the time they have already been retained.

D.Flashback logs are monitored and proactively deleted when beyond the retention period defined in db_flashback_retention_target before there is space pressure.

E.Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_flashback_retention_TARGET only after there is space pressure

Question 149

Which two are true about Oracle Database Configuration Assistant (DBCA) templates? (Choose two.)

A.The General Purpose of Transaction Processing templates are most suitable when concurrency and recoverability are key criteria.

B.Oracle DBCA templates can store only logical structure and not database files.

C.New templates can only be created by modifying an existing user-created template.

D.The Data Warehouse template is most suitable when transaction response time is the key criterion.

E.Oracle DBCA templates can be used to create new databases and duplicate existing databases.

Question 150

Which three are true about managing memory components in an Oracle database instance? (Choose three.)

A.With Automatic Shared Memory Management, the database instance can increase the Large Pool size by reducing the Shared Pool size.

B.With Automatic Memory Management, the database instance can increase the System Global Area size by reducing the Program Global Area size.

C.Automatically tuned and resized System Global Area components will always revert to their initial sizes after an instance restart.

D.Automatic Memory Management must be used together with locking the System Global Area into physical memory.

E.With Automatic Shared Memory Management, the database instance can increase the Program Global Area size by reducing the System Global Area size.

F.On Line Transaction Processing systems often use less Program Global Area than Decision Support Systems.

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Question 146

Question 147

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Question 150

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