You inadvertently delete some RMAN backups with operating system commands. You perform additional backups from RMAN again but you need to remove the deleted backups from the recovery catalog. What commands can you use to clean up the catalog? (Choose all that apply.)

Answer: B,D

Explanation: The CROSSCHECK command compares the backups in the catalog to the actual backups on disk, and the UNCATALOG command unconditionally removes a backup from the recovery catalog. A is incorrect because DELETE EXPIRED removes only entries from the recovery catalog whose status is EXPIRED. C is incorrect because DELETE OBSOLETE deletes only backups that are no longer needed to satisfy the retention policy. E is incorrect because the command DELETE UNAVAILABLE does not exist.