Oracle Database Administration II — Question 25

Which two are true about RMAN duplexed backup sets? (Choose two.)

Answer options

• A. A duplexed backup set uses the same number of SBT channels as a non-duplexed backup set for the same number of files.
• B. A non-duplexed backup set written to disk can be duplexed to disk by backing up the backup set that is already on disk.
• C. A non-duplexed backup set written to SBT can be duplexed to tape by backing up the backup set that is already on tape.
• D. A non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk.
• E. A non-duplexed backup set written to SBT can be duplexed to disk by backing up the backup set that is already on tape.
• F. A duplexed backup set always uses twice as many SBT channels as a non-duplexed backup set for the same number of files.

Correct answer: B, D

Explanation

Option B is correct because it accurately describes how a backup set on disk can be duplicated by backing it up again. Option D is also correct as it explains that a backup set on disk can be copied to tape. The other options are incorrect because they either misrepresent the process of duplexing or the medium involved.