首页 > 其他 > 详细

OCP换题库了,052最新考题及答案整理-第11题

时间:2018-07-13 10:57:53      阅读:250      评论:0      收藏:0      [点我收藏+]
11、Which three are true about UNDO data?

A) It is used to roll back failed transactions.

B) It is used to rewind a database by using FLASHBACK DATABASE.

C) It is used to recover dropped tables by using FLASHBACK TABLE … TO BEFORE DROP.

D) It is used to enable ROLLBACK statements to roll back uncommitted updates.

E) It is used to provide read consistency.

F) It is used during online backups to guarantee their consistency.

Answer:ADE

OCP换题库了,052最新考题及答案整理-第11题

原文:http://blog.51cto.com/13854012/2141302

(0)
(0)
   
举报
评论 一句话评论(0
关于我们 - 联系我们 - 留言反馈 - 联系我们:wmxa8@hotmail.com
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!