You want to take a complete database backup using RMAN. The backup should consist only
the used blocks from your database.
Which two statements are true about this backup operation? (Choose two.)
A.
Backup compression should be enabled
B.
Parallelism for the channel should be set to 2
C.
All the files must be backed up as backup sets
D.
The backup may be stored either on disk or on media with media manager
“only used blocks” => backup set not image copy.
backup set can be stored on Disk or Tape (while image copy can store on Disk only)