You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN).Which two are the prerequisites to perform this operation？（）

A . You must configure block change tracking file B . You must have first level 1 backups for RMAN to restore blocks C . You must ensure that the SALES database is mounted or open D . You must have full or level 0 backups for RMAN to restore blocks E . You must take the tools01.dbf data file offline before you start a block media recovery

时间：2022-10-21 22:48:28 所属题库：OCP 11G认证考试题库

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