OCP-1Z0-052-V8.02-78题

jxh1230

　　78. You are managing an Oracle Database 11g database. The database is open, and you plan to perform
　　Recovery Manager (RMAN) backups. Which three statements are true about these backups? (Choose
　　three.)
　　A.The backups would be consistent.
　　B.The backups would be inconsistent.
　　C.The backups would be possible only if the database is running in ARCHIVELOG mode.
　　D.The backups would be possible only if the database is running in NOARCHIVELOG mode.
　　E.The backups need to be restored and the database has to be recovered in case of a media failure.
　　Answer: BCE
　　答案解析：
　　A,B：在数据库打开的情况下备份，始终是不一致的。所以A错B对。
　　C,D：只有在归档模式下，rman才能进行备份。所以C对，D错。
　　E: 如果出现介质故障，则用restore备份中还原数据文件，用recover通过应用增量备份和重做日志文件中记录的更改来恢复已还原文件到最近的事务提交点。E正确。
　　参考：http://blog.iyunv.com/rlhua/article/details/12346829
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