Oracle OCP认证考试题库解析052-4

43tw2e2

QUESTION 4


In which of the scenario will the DBA perform recovery? (Choose all that apply.)

A. The alert log file is corrupted

B. A tablespace is accidentally dropped

C. One of the redo log members is corrupted

D. A database user terminates the session abnormally

E. The hard disk on which the data files is stored is corrupted


Correct Answer: BE


Explanation/Reference:



DBA一般在数据库出现介质损坏的时候执行恢复操作.



A: 错误,alert日志损坏数据库不会丢失数据,不需要恢复.

B: 正确,表空间在操作系统改名需要执行恢复,数据库找不到表空间对应的数据文件.

C: 错误,丢失redo成员,不会丢失数据,不需要执行恢复操作.

D: 错误,会话异常终止不会丢失数据,不需要恢复,数据库会释放异常会话占用的资源.

E: 正确,磁盘损坏会导致在该磁盘的数据文件损坏,需要执行恢复操作.

cheng029

啦啦啦