（706）You execute the following command to set the redundancy retention policy in Recovery Manager(RMAN):

RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 3;

Identify the statement that correctly describes the implications of this command.

A. when there are already three backups,for the fourth backup RMAN removes the oldest backup.

B. When there are already three backups,for the fourth backup RMAN marks the oldest backup as obsolete.

C. the number of backups that are retained is equal to three and it includes full,incremental,and cumulative backups.

D. when there are already three backup,one of the existing backups must be removed manually before taking the fourth backup.

答案：（B）

解析：

C（X），保留期策略只会应用于完全或level 0数据文件和控制文件备份。

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Oracle 11G OCP 1Z0-053 706