Which of the following are true concerning block media recovery? (Choose all that apply.)
A. Any gap in archive logs ends the recovery.
B. If a gap in archive logs is encountered, RMAN will search forward for newer versions of the blocks that
are not corrupt.
C. Uncorrupted blocks from the flashback logs may be used to speed recovery.
D. The database can be in NOARCHIVELOG mode.
E. None of the above.
Option A is incorrect because a gap in archive logs does not automatically end the recvoery.
RMAN will search foward for uncorrupted newer blocks;if RMAN finds one,it will continue with the
restore and recovery operation.RMAN will check the flashback logs for uncorrupted copies of the
block before it checks the backups.Option D is incorrect because the database must be in ARCHIVELOG
mode.
原文：http://www.cnblogs.com/Babylon/p/7795845.html