Free Access Oracle.1Z0-083.v2025-05-02.q283 Practice Test (Page 39)

Question 186

A container database (CDB) contains two pluggable databases PDB1 and PDB2.
The LOCAL_UNDO_ENABLED database property is set to FALSE in the CDB. Data file 24 of PDB2 was deleted and you need to restore and recover it.
The only RMAN backup that exists was created with the BACKUP DATABASE command 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 and recovered while connected to CDB$ROOT.

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

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

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

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

Question 187

Examine this configuration: 1. CDB1 is a container database. 2. PDB1 and PDB2 are pluggable databases in CDB1. You execute these commands successfully: Which two are true? (Choose two.)

A.Redo logs are opened.

B.PDB1 and PDB2 are in MOUNT state.

C.PDB$SEED is in READ ONLY state.

D.PDB1 and PDB2 are in READ ONLY state.

E.CDB$ROOT is in MOUNT state.

Question 188

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

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

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

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

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

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

Question 189

Choose two. Examine this configuration: 1. CDB1 and CDB2 are two container databases. 2. PDB1 is a pluggable database in CDB1. 3. PDB1_C1_SRV is a service for PDB1. 4. CDB1_LINK is a database link in CDB2 referring to PDB1. 5. CDB2 is also an entry in tnsnames.ora pointing to the CDB2 database default service. You execute these commands successfully: $ sqlplus sys/oracle_4U@cdb2 as sysdba SQL> CREATE PLUGGABLE DATABASE PDB1 FROM PDB1@CDB1_LINK SERVICE_NAME_CONVERT= ('PDB1_C1_SRV', 'PDB1_C2_SRV') ; Which two are true?

A.PDB1_C2_SRV will be created and started automatically.

B.PDB1 will be created in CDB2 and left in MOUNT state.

C.PDB1_C1_SRV in CDB1 will be renamed PDB1_C2_SRV.

D.PDB1 will be created in CDB2 and automatically opened.

E.PDB1_C2_SRV will be created but not started.

Question 190

Which three are true about Data Pump in an Oracle multitenant environment?

A.It can be used to transport data from a non-CDB to a PDB.

B.It can be used to clone a CDB.

C.It can be used to create a new PDB.

D.It can be used to transport data between PDBs.

E.It can be used to transport data from a PDB to a non-CDB.

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Question 186

Question 187

Question 188

Question 189

Question 190

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