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Home > Oracle > Oracle Certifications > 1Z0-083
Oracle 1Z0-083  Exam Questions & Answers
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Oracle 1Z0-083 Exam Questions & Answers


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  • Vendor: Oracle

    Exam Code: 1Z0-083

    Exam Name: Oracle Database Administration II

    Certification Provider: Oracle

    Total Questions: 273 Q&A ( View Details)

    Updated on: Jun 10, 2025

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1Z0-083 Online Practice Questions and Answers

Questions 1

Examine these queries and their output:

After a system crash, an instance restart and an attempted opening of the PDBs result in:

Which two are true? (Choose two.)

A. Data file 24 can be recovered while PDB2 is opened.

B. Data file 24 must be recovered while the CDB is opened.

C. Data file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.

D. Data file 24 cannot be recovered while the CDB is opened.

E. Data file 24 must be recovered while PDB2 is closed.

Show Answer

Correct Answer: AC

Datafile 24 belongs to PDB1.

A. It can be recovered while CDB while PDB2 is opened, as it belongs to PDB1.

C. the datafile belongs to PDB1 and CAN be recovered while CDB is opened or in mount state.

Questions 2

Which two are true about RMAN backups when using a media manager to write backups to tape when there are only two tape drives? (Choose two.)

A. SBT tape compression can be used even if no RMAN compression is configured.

B. Any backup set written to the SBT device in this configuration can contain a maximum of two backup pieces.

C. Any backup written to the SBT device in this configuration can contain a maximum of two backup sets.

D. SBT tape compression and RMAN backup compression should be used in parallel.

E. The SBT device should be configured to use PARALLELISM 2 to allow both tape drive to be used simultaneously.

Show Answer

Correct Answer: AE

A. SBT tape compression can be used even if no RMAN compression is configured.

B. Any backup set written to the SBT device in this configuration can contain a maximum of two backup pieces.

C. Any backup written to the SBT device in this configuration can contain a maximum of two backup sets.

D. SBT tape compression and RMAN backup compression should be used in parallel.

E. The SBT device should be configured to use PARALLELISM 2 to allow both tape drive to be used simultaneously.

A - sbt tape compression independently can be used on the TAPE side. Oracle recommends You should not use both tape compression provided by the media manager _and_ binary compression provided by RMAN. If the media manager compression is efficient, then it is usually the better choice. Using RMAN-compressed backup sets can be an effective alternative to reduce bandwidth used to move uncompressed backup sets over a network to the media manager, if the CPU overhead required to compress the data in RMAN is acceptable.

Questions 3

Which two are true about creating RMAN backups for an Oracle container database? (Choose two.)

A. Tablespaces from different PDBs with identical names must be backed up by connecting RMAN separately to each PDB to back up the tablespaces.

B. The BACKUP DATABASE command will create a pluggable database (PDB) backup when RMAN is connected to a PDB.

C. SPFILE backups can be created while connected to an application root PDB.

D. The BACKUP DATABASE PLUS ARCHIVELOG command will back up archive logs when RMAN is connected to a PDB.

E. The BACKUP PLUGGABLE DATABASE command can be used to back up CDB$ROOT.

Show Answer More Questions

Correct Answer: BE

E is correct

tested: backup pluggable database "cdb$root". the quotes due to the $ symbol. it backups only the root container files (no pdb datafiles).

tested CD: both incorrect

Tested b: correct

A is not correct due to the "must". you can connect to cdb and distinguish between tbs with same name in different pdbs with qualifying

RMAN> BACKUP TABLESPACE pdb1:system, pdb1:sysaux, pdb1:users, pdb2:system;

Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/backing-up-database.html#GUID-655DC5F5-FF8D-4A73-B67D-F5AAE20CA382

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