1Z0-053多項選擇題每日一練(2019.11.04)

A. It’s only supported for the backups performed on the tape
B. It is not supported for backup operations that produce image copies
C. Duplex backups need a parallelism for the device to be equal to number of copies
D. Duplex backups can be performed to either disk or tape， but cannot be performed on tape and disk simultaneously

A. Schedule object
B. Program object
C. Job object
D. Resource plan
E. Resource consumer group

A. Only data files and the control file are backed up.
B. Archived redo logs are backed up only if the database is open during the backup.
C. The backup is deleted after one day，regardless of the default retention policy settings. 
D. The backup becomes obsolete after one day，regardless of the default retention policy settings.

A. It requires relinking of the Oracle binary.
B. It does not require database instance shutdown.
C. It can detect conflicts between two online patches.
D. It is available for installing all patches on all platforms. 
E. It works only in a single database instance environment.

A. To remove missing backup set pieces physically from disk
B. To remove metadata related to backup set pieces in the control file and the recovery catalog
C. To mark as deleted records in the control file and the recovery catalog associated with obsolete backup sets
D. To delete backup set pieces associated with backups that are no longer needed due to retention criteria
E. To remove old versions of RMAN backups