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Oracle 1Z0-083 Exam Syllabus Topics:

Section	Objectives
Storage and Space Management	- Tablespaces and datafiles - Segment management
Performance Management	- Automatic Workload Repository (AWR) and diagnostics - SQL performance tuning
Security Management	- User management and privileges - Database auditing and encryption
Database Backup and Recovery	- RMAN configuration and backup strategies - Database recovery techniques
Database Architecture and Administration	- Multitenant container database (CDB/PDB) concepts - Oracle Database architecture components

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Oracle Database Administration II Sample Questions (Q260-Q265):

NEW QUESTION # 260
Choose three. Which three are true about cloning databases into an existing CDB with RMAN?

A. A user with SYSDBA or SYSBKUP must be logged in with RMAN to the non-CDB being cloned when cloning a non-CDB.
B. A user with SYSDBA or SYSBKUP must be logged in with RMAN to CDB$ROOT when cloning a PDB.
C. The target and auxiliary instance passwords must be the same.
D. A non-CDB can be cloned into a PDB.
E. Two or more PDBs can be cloned with the same command.
F. Only one PDB can be cloned at a time.

Answer: A,B,F

NEW QUESTION # 261
Which two are true about flashback features in Oracle Database 19c and later releases? (Choose two.)

A. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGETonly after there is space pressure.
B. Flashback logs are automatically purged whenever the value of DB_FLASHBACK_RETENTION_TARGETis changed.
C. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGETbefore there is space pressure.
D. Flashback logs are monitored for being older than the retention period defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
E. Flashback logs are automatically purged when DB_FLASHBACK_RETENTION_TARGETis set lower than the time they have already been retained.

Answer: C,E

Explanation:
Starting with Oracle Database Release 19c, the management of space in the fast recovery area is simplified.
Oracle Database monitors flashback logs in the fast recovery area and automatically deletes flashback logs that are beyond the retention period.
When the retention target is reduced, flashback logs that are beyond the retention period are deleted immediately.
In scenarios where a sudden workload spike causes a large number of flashback logs to be created, the workload is monitored for a few days before deleting flashback logs that are beyond the retention period.
This avoids the overhead of recreating the flashback logs, if another peak workload occurs soon after.

NEW QUESTION # 262
You issued this command:
RMAN> BACKUP RECOVERY FILES;
Which two are true? (Choose two.)

A. All non-Oracle files in the current FRA that have not been backed up already, are backed up.
B. All Oracle recovery files in the current fast recovery area (FRA) are backed up.
C. These backups can be written to disk or SBT.
D. All Oracle recovery files in the current FRA that have not been backed up already, are backed up.
E. All Oracle recovery files not in the current FRA that have not been backed up already, are backed up.

Answer: B,C

Explanation:
https://blog.toadworld.com/rman_-_using_the_flash_recovery_area

NEW QUESTION # 263
Which three are true about monitoring waits for sessions and services? (Choose three.)

A. V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.
B. V$SESSION_WAIT_CLASS displays waits broken down by wait class only for waiting sessions.
C. V$SESSION_EVENT displays all waits for all past and existing sessions if the wait has occurred at least once for a session.
D. V$SESSION_EVENT displays all waits for all past sessions if the wait has occurred at least once for a session.
E. V$SERVICE_EVENT displays all waits for all services if the wait has occurred at least once for a service.
F. V$SESSION_WAIT and V$SESSION both contain details of the event on which a session is currently waiting.

Answer: A,D,E

NEW QUESTION # 264
While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup istaking too long and suspect a performance bottleneck. Which three are true about diagnosing and tuning these problems? (Choose three.)

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

Answer: B,D,E

NEW QUESTION # 265
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