单项选择题

If a backup set is expired， what can you do to correct the problem？（）

A. Change the retention criteria.
B. Make the lost backup set pieces available to RMAN again.
C. Run the crosscheck command to correct the location for the backup set piece contained in the metadata.
D. Nothing. The backup set piece is lost forever.
E. Call Oracle support，their assistance is required.

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单项选择题

What does it mean if a backup is expired？（）

A. The backup set has exceeded the retention criteria set in RMAN and is eligible for removal.
B. The backup set has one or more invalid blocks in it and is not usable for recovery.
C. The backup set contains one or more tablespaces no longer in the database.
D. The backup set contains one or more missing backup set pieces.
E. The backup set is from a previous version of RMAN and was not upgraded.

多项选择题

Why would you run the delete obsolete command？（）

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

单项选择题

You run the following commands：
RMAN> list expired backup； RMAN> delete expired backup；
What will happen to the backup set pieces associated with the backups that appear in the list expired backup command？（）

A. They will be renamed.
B. Nothing will happen to them. The backup set pieces do not exist.
C. They will be deleted immediately since they are not in the flash recovery area.
D. You will need to manually remove the physical files listed in the output of the commands.
E. They will become hidden files and removed 10 days later.