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1z0-497 Exam Dumps : Oracle Database 12c Essentials

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Oracle Database 12c Essentials Questions and Answers

Question 1

Examine the output:

SQL> SELECT index_name, status FROM dba_indexes WHEREstatus='UNUSABLE’;

INDEX_NAME STATUS

--------------------- -----------------

EIND UNUSABLE

Which two statements about this index are true?

Options:

A.

It is ignored by the query optimizer.

B.

It is not used while the index is being rebuilt.

C.

The index cannot be rebuilt, and has to be re-created.

D.

The index is automatically rebuilt when used the next time.

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Question 2

John is a CDB administrator, and Mike and Tim are PDB administrators of their respective databases- John takes a complete CDB backup by using RMAN>Backup Database. Mike and Tim may need point-in-time recovery of their PDBs. Which statement is true?

Options:

A.

Recovery of individual PDBs is not possible, because John did not back up by using RMAN>Backup Pluggable database pdb1 pdb2. However, complete CDB recovery is still possible.

B.

Mike and Tim need to individually take backups of their respective PDBs, because CDB-level backup does not include PDB data dictionary objects.

C.

Mike and Tim do not need to worry, because recovery of individual PDBs is possible.

D.

Recovery of individual PDBs is not possible at all.

Question 3

Real-Time ADDM detects a high-load performance issue within the database. Which condition triggered it?

Options:

A.

The average active sessions were more than three times the number of CPU cores.

B.

Active sessions were more than 10% of total load and CPU utilization was more than 50%.

C.

Memory allocations were more than 95% of physical memory.

D.

Hung sessions were more than 10% of total sessions.

E.

A deadlock was detected.

F.

The session limit was close to 100%.