1Z0-083 latest Oracle certification exam questions and answers published

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To be eligible to take the 1Z0-083 exam, candidates must have already earned the Oracle Certified Associate (OCA) certification in database administration. This prerequisite ensures that candidates have a solid foundation in the basics of Oracle Database administration before attempting the more advanced topics covered in this exam.

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2023 New 1Z0-083 Exam Sample: Oracle Database Administration II - High Pass-Rate Oracle 1Z0-083 Exam Brain Dumps

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Oracle Database Administration II Sample Questions (Q217-Q222):

NEW QUESTION # 217
While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup is taking too long and suspect a performance bottleneck.
Which three are true about diagnosing and tuning these problems? (Choose three.)

A. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
B. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.
C. If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
D. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
E. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.
F. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.
G. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using asynchronous I/O/

Answer: C,D,E

Explanation:
Reference:
https://web.stanford.edu/dept/itss/docs/oracle/10gR2/backup.102/b14191/rcmtunin003.htm

NEW QUESTION # 218
Which three are true about Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the Manageability Monitor (MMON) background process?

A. By default, AWR snapshots are automatically purged after eight days.
B. ADDM can recommend extending the buffer cache.
C. ADDM can recommend shrinking the buffer cache.
D. By default, MMON creates an AWR snapshot every 30 minutes.
E. AWR snapshots must be deleted when no longer required by ADDM.
F. ADDM performs its analysis only when a DBA requests it.

Answer: A,C,F

NEW QUESTION # 219
Choose three. Which three are true about a whole database backup?

A. It always includes all data files, the current control file, the server parameter file, and archived redo logs.
B. It is the only possible backup type for a database in NOARCHIVELOG mode.
C. It can be created only by using RMAN.
D. It can be consistent.
E. It can consist of either backup sets or image copies. F) It can be inconsistent.

Answer: D,E

NEW QUESTION # 220
Choose the best answer. Examine this configuration: 1. CDB1 is an Oracle Database 12c Release 2 container database (CDB). 2. PDB1 and PDB2 are two pluggable databases (PDBs) in CDB1. After successfully performing all the preupgrade tasks, you execute these commands from the Oracle Database 18c environment: $ export ORACLE_SID=cdb1 $ sqlplus / as sysdba SQL> STARTUP UPGRADE; SQL> SHOW pdbs CON_ID CON_NAME OPEN MODE RESTRICTED ---------------------------------------------------------------2 PDB$SEED 3 PDB1 4 PDB2 MIGRATE YES MOUNTED YES MOUNTED YES SQL> ALTER PLUGGABLE DATABASE pdb1 OPEN UPGRADE; Pluggable database altered. SQL> exit $ $ORACLE_HOME/perl/bin/perl catctl.pl -C 'PDB2' What is the outcome?

A. Only CDB$ROOT and PDB$SEED are upgraded.
B. It fails because PDB$SEED is in MIGRATE state.
C. Only CDB$ROOT, PDB$SEED, and PDB2 are upgraded.
D. CDB$ROOT, PDB$SEED, PDB1, and PDB2 are upgraded.
E. Only CDB$ROOT, PDB$SEED, and PDB1 are upgraded.
F. It fails because PDB2 is not in UPGRADE state.

Answer: F

NEW QUESTION # 221
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 PDB2 is closed.
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 the CDB is opened.

Answer: A,E

Explanation:
Explanation
19c: PDB SYSTEM or UNDO Tablespace Recovery: The CDB and all other PDBs can be left opened. 1.
Connect to PDB 2. Shutdown abort the PDB, if its not automatically done. sqlplus sys@sales_pdb as sysdba sql> SHUTDOWN ABORT; OR ALTER PLUGGABLE DATABASE CLOSE ABORT; rman target sys@slaes_pdb rman> restore database; rman> recover database; rman> alter pluggable database sales_pdb open;

NEW QUESTION # 222
......

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