OCP 1Z0 052 61

61. Given below is a list of scenarios:

1) A user terminates his session abnormally.

2) The connection between the server and the client application terminates because of a network failure.

3) A schema is accidentally dropped.

4) The tablespace is accidentally dropped from the database.

5) The hard disk gets corrupted and the data files in the disk are lost.

6) The database instance abnormally shuts down because of power failure.

Which scenarios require DBA intervention to perform recovery?

A.4 and 5

B.1, 3, and 6

C.4, 5, and 6

D.3, 4, and 5

E.1, 2, and 6

Answer: D

1、会话断开，相关事务会被回滚。

2、同1一样，会话异常中断

3、用户异常drop，需要恢复后recovery

4、表空间异常drop，需要恢复后recovery

5、数据文件损坏，需要恢复后recovery

6、示例异常关闭，启动后会自动recovery，不需要dba干预