In which three situations would you perform a compressed backup?

You are using Recovery Manager (RMAN) to perform backups. In which three situations would you perform a compressed backup? (Choose three.)

A.
Your database includes a large number of BFILEs.

B.
You are making image copies, and you have not enabled tablespace compression.

C.
You are backing up to tape and your tape device performs its won compression.

D.
You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited.

E.
You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage.

F.
You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage.

Explanation:
D – If you are using disk-based backups and disk space in your flash recovery area or other disk-based backup destination is limited
E – If you are performing your backups to some device over a network and reduced network bandwidth is more important than CPU usage
F – If you are using some archival backup media such as CD or DVD, where reducing backup sizes saves on media costs and archival storage REF.: Backup and Recovery Basics – p4-6