What are the two different types of database duplication？（）

A. report schema
B. report need backup
C. report need backup days 3
D. report user
E. report obsolete

A. To review RMAN control file and recovery catalog metadata and ensure that its correct
B. To delete RMAN backup-related metadata from the recovery catalog
C. To create metadata in the control file and the recovery catalog related to backup set pieces 
D. To create a report that lists database backups
E. To rebuild the recovery catalog

A. A backup set that is missing one or more backup set pieces
B. A backup that has exceeded the retention criteria and is no longer needed
C. A backup set that does not include archived redo logs
D. A backup set that can not be recovered due to corruption
E. A backup set superceded by a datafile copy