A. A tablespace is taken offline.
B. The database instance is restarted.
C. A new data file is added to an existing tablespace.
D. A successful backup is recorded in the RMAN repository.
E. The RMAN connection is disconnected from the target database.

A. Create a backup of the database and recover all corrupted blocks found in the backup.
B. Run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the database.
C. Run a backup validation to populate V$COPY_CORRUPTION view， and then list any corrupt blocks recorded in the view.
D. Run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view， and then repair any corrupt blocks recorded in the view.
E. Run a backup validation， repair any corrupt blocks found during the validation process， and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired.