Oracle试题:032的144题Oracle认证考试

文章作者 100test 发表时间 2009:04:09 22:29:26
来源 100Test.Com百考试题网


question no: 144
after running the configure retention policy to recovery window of 7 days command, what has been accomplished?
a. retain the data file backup for 7 days.
b. run the recover process every 7 days.
c. destroy the physical backup files every 7 days.
d. destroy the physical backup files older than 7 days.
e. retain one backup of each data file for at least 7 days.
f. keep the catalog information in the control file for 7 days.

答案是 e,
请问a,e 有什么区别吗?

解答:

如果在 7 天內還沒有新的備份,那麼即使舊的備份已超過 7 天,但仍然還是要保留的。這就是 a 與 e 的不同之處。

答案是e
a是說 db 的datafile
e是說 backup set 的datafile
retention policy 是定義backup保存的時間 所以答案是e



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