Oracle Database 12c: Multitenancy Essentials — Question 32

Which two statements are true about RMAN incremental level-1 backups for a database running on an X5 Database Machine?

Answer options

• A. Block Change tracking (BCT) is not needed for databases in an X5 Database Machine, because ASM automatically does block change tracking when diskgroups are built from griddisks.
• B. cellsrv filters blocks and returns only those that have changed since the last backup, for databases in archivelog mode.
• C. cellsrv returns all blocks that have been or might have been changed since the last backup, and RMAN filters the blocks that do not require backup.
• D. cellsrv filters blocks and returns only those that have changed since the last backup, for databases in noarchivelog mode.
• E. Block Change Tracking (BCT) is not needed for databases in an X5 Database Machine, because change tracking is done by cellsrv.

Correct answer: D, E

Explanation

Option D is correct as it accurately describes how cellsrv operates in noarchivelog mode, filtering only changed blocks since the last backup. Option E is also correct as it states that BCT is not needed because cellsrv handles change tracking. The other options either misrepresent the function of cellsrv or apply to the wrong mode of database operation.