4. þ B, D, and F. Offline backups must be done in mount mode. This is
the only backup type for a noarchivelog mode database, but it can be
incremental.
ý A, C, and E. A is wrong because the database must be mounted, or RMAN
won’t be able to connect to its repository or find the location of the datafiles.
C is wrong because an IMMEDIATE shutdown is clean—it is only an ABORT
that would cause problems. E is wrong because an archivelog mode database
can certainly be backed up offline—it just isn’t necessary.
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