Free Access Oracle.1Z0-083.v2024-08-30.q181 Practice Test (Page 17)

Question 76

Which two are true about poorly performing SQL statements and their tuning in Oracle database instances?

A.SQL statements doing joins always do more physical I/O than single table queries.

B.SQL statements performing many physical I/Os can always have their performance improved by creating indexes.

C.The solution that best optimizes one SQL statement can degrade the performance of others.

D.SQL statements doing only logical reads never require tuning because they do no physical I/O.

E.Poorly performing SQL statements can be tuned automatically by the Oracle server.

Question 77

You plan to install Oracle Grid Infrastructure for a Standalone Server and Oracle Database for the first time on a server. Examine this command and its outcome: Which two are true? (Choose two.)

A.The user account, oracle, and group, oinstall, can be used for all Oracle software installations.

B.oracle will be granted the SYSASM privilege when installing the Oracle Database software.

C.oracle must be the owner of every Oracle Database installation.

D.oracle can own an Oracle Database installation but not an Oracle Grid Infrastructure installation.

E.oracle will be an owner of the Oracle Inventory.

Question 78

Which three are true about transporting databases across platforms using Recovery Manager (RMAN) image copies? (Choose three.)

A.By default, the transported database will use Oracle Managed Files (OMF)

B.Data files can be converted on the destination system.

C.Data files can be converted on the source system.

D.A new DBID is automatically created for the transported database.

E.Databases can be transported between systems with different endian formats.

F.The password file is automatically converted by RMAN.

Question 79

A container database (CDB) contains two pluggable databases PDB1 and PDB2.
The LOCAL_UNDO_ENABLEDdatabase property is set to FALSEin the CDB.
Data file 24 of PDB2was deleted and you need to restore and recover it.
The only RMAN backup that exists was created with the BACKUP DATABASEcommand while connected to CDB$ROOT.
Which three are true? (Choose three.)

A.Data file 24 can be recovered while connected to CDB$ROOT.

B.Data file 24 can be restored only while connected to PDB2.

C.Data file 24 can be restored and recovered while connected to CDB$ROOT.

D.Data file 24 can be restored only while connected to CDB$ROOT.

E.Data file 24 can be recovered while connected to PDB2.

F.Data file 24 can be recovered only while connected to PDB2.

Question 80

Choose the best answer. How do you configure a CDB for local undo mode?

A.Open the CDB in read-only mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then change the CDB to read/write mode.

B.Open the CDB instance in upgrade mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then restart the CDB instance.

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 then 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 then restart the CDB instance.

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Question 76

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