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NEW QUESTION 32
Which two are true about the Optimizer Statistics Advisor?
- A. It always analyzes all schemas in the database.
- B. It can be run only manually.
- C. It runs automatically every night by default.
- D. It can be run only automatically.
- E. It can recommend changes to improve the statistics gathering process.
Answer: D,E
NEW QUESTION 33
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$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
- B. If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
- C. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.
- D. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.
- E. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using asynchronous I/O/
- F. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
- G. 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.
Answer: A,B,D
Explanation:
Reference:
https://web.stanford.edu/dept/itss/docs/oracle/10gR2/backup.102/b14191/rcmtunin003.htm
NEW QUESTION 34
Examine the command for creating pluggable database PDB2 in container database CDB2.
Select three options, any one of which is required for it to execute successfully. (Choose three.)
- A. Add the FILE_NAME_CONVERT clause to the statement and enable Oracle Managed Files (OMF)
- B. Set only the PDB_FILE_NAME_CONVERT parameter.
- C. Add the FILE_NAME_CONVERT clause to the statement and set the PDB_FILE_NAME_CONVERT parameter.
- D. Enable only OMF.
- E. Set the PDB_FILE_NAME_CONVERT parameter and enable OMF.
- F. Add only the CREATE_FILE_DEST clause to the statement.
Answer: D,E,F
NEW QUESTION 35
Which three are true about RMAN persistent configuration settings, administration, and their effects? (Choose three.)
- A. The RMAN SHOW ALL command displays only settings with nondefault values.
- B. A target database’s persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.
- C. A DBA must specify either a redundancy retention policy or a recovery window retention policy.
- D. The V$RMAN_CONFIGURATION view displays only settings with values that have been modified.
- E. Backup older than the recovery window retention policy are always deleted automatically if the backup location has insufficient space.
- F. A target database’s persistent RMAN configuration settings are always stored in the target’s control file
- G. Backups written to the fast recovery area (FRA) that are oboslete based on the redundancy retention policy can be deleted automatically to free space.
Answer: D,F,G
NEW QUESTION 36
Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases? (Choose two.)
- A. A PDB snapshot depends on a storage snapshot which can be stored on any file system.
- B. A snapshot copy PDB depends on a storage snapshot which can be stored on any file system.
- C. A PDB snapshot is always a sparse copy of the source PDB.
- D. A snapshot copy PDB can be created from a stand-alone clone PDB.
- E. A PDB snapshot depends on a storage snapshot which can only be stored on specific file systems.
- F. A PDB snapshot is always a full copy of the source PDB.
- G. A snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems.
Answer: E,F
Explanation:
Explanation/Reference: https://docs.oracle.com/en/database/oracle/oracle-database/18/multi/administering-pdb- snapshots.html#GUID-35B03C37-00BA-4945-BF20-9A7C4C541955
NEW QUESTION 37
……
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