[多选]
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

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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.)

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[多选] 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.)

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[多选]
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.)