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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:41      评论:0      收藏:0      [点我收藏+]

标签:ransac   action   hba   before   rollback   sta   sed   date   nsis   

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

标签:ransac   action   hba   before   rollback   sta   sed   date   nsis   

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

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