052-61

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

通常情况下只有用户误操作和介质故障才需要 DBA 人工干预
1 用户异常终止会话，属于用户进程失败
2 属于网络故障
3 属于用户误操作
4 也属于用户误操作
5 属于介质故障
6 断电属于实例故障