單項選擇題

If a backup is expired， which of the following is true？（）

A. It can never be used for a restore/recover operation.
B. Oracle will remove the backup set pieces from the flash recovery area.
C. The backup has been used at least once to restore and recover the database.
D. The backup is no longer valid because of a resetlogs operation.
E. The physical backup set pieces are missing from the media.

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多項選擇題

What information does the report schema command not provide？（）

A. Size of the datafiles
B. Size of the tempfiles
C. Date of last backup for datafiles and tempfiles
D. Filenames for each datafile
E. Checkpoint SCN associated with the last RMAN backup

單項選擇題

Why would you execute the report obsolete command？（）

A. To list all backups that were no longer available for restore operations
B. To list all backups that had aged beyond the RMAN retention criteria
C. To list all backup set pieces listed in control-file or recovery-catalog metadata that are not on the backup media
D. To list all datafiles that are no longer part of the database and thus do not need to be backed up
E. To list all archived redo logs that are no longer needed for any database recovery

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If a backup is expired， which of the following is true？（）

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What information does the report schema command not provide？（）

Why would you execute the report obsolete command？（）

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If a backup is expired， which of the following is true？（）

What information does the report schema command not provide？（）

Why would you execute the report obsolete command？（）