OCP认证052考题解析：1Z0-V8.02-第75题

文章来源：更新时间:2016/8/12 15:53:47

在线老师点击咨询：

最新学讯：近期OCP认证正在报名中，因考试人员较多请尽快报名获取最近考试时间，报名费用请联系在线老师，甲骨文官方认证，报名从速！

我要咨询

OCP认证052考题解析：1Z0-V8.02-第75题，完整题库请点击这里联系老师咨询了解

75. Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERS tablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten since the last backup.

What would you do to recover the data file?

A.Take the USERS tablespace offline and re-create the lost data file.

B.Shut down the instance, restore the data file from the last consistent backup, and restart the database instance.

C.Shut down the instance, restore all the database files from the last consistent backup, and restart the database instance.

D.Take the USERS tablespace offline, restore all the data files of the USERS tablespace from the last consistent backup, and make the tablespace online.

Answer: C

答案解析：

在非归档模式下，只能使用冷备份来备份所有的文件，当数据文件丢失，重做日志被覆盖。则只能恢复到最近一次的一致性备份。不能用重做日志恢复到指定的时间点。

数据库处于NOARCHIVELOG模式(默认模式)时，只能恢复到最后一次备份时的状态。在该备份之后执行的所有事务处理都会丢失。