You are peer reviewing a fellow DBAs backup plan for his NOARCHIVELOG mode database, as
shown here:
1.Put the tablespaces in backup mode.
2.Back up the datafiles for all tablespaces.
3.Take the tablespaces out of backup mode.
4.Back up all archived redo logs.
Your colleague asks for you to comment on his plan. Which response would be correct?
A. The plan will work as is.
B. The plan needs to be modified to allow for an archive-log switch after step 3.
C. The plan needs to be modified so that a backup of the archived redo logs occurs before step 1.
D. The plan needs to be adjusted to shut down the database after step 1 and to restart the database after
step 2.
E. The plan cannot work as presented.
这题很多答案都是B，看下官方解释:
Since the database is in NOARCHIVELOG mode,the entire plan will not work
since you can not perform hot backups in NOARCHIVELOG mode.If the database was
in ARCHIVELOG mode,then you would choose option B.
归档模式选B。
原文：http://www.cnblogs.com/Babylon/p/7792646.html