[单选]
You issue the following RMAN command to set a retention policy on a database： RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2；
What will be the outcome of the above command？（）

A . After two days， the backup will be marked obsolete.
B . After two days， the backup will be deleted from the media.
C . If the RMAN repository has records of two or more recent backups of a file， then the older backup will be deleted from the media.
D . If the RMAN repository has records of two or more recent backups of a file， then the older backup will be marked obsolete.

前苏联游戏理论研究的典型特征是坚持游戏的（）生物性本质观。社会性本质观。主体性本质观。科学性本质观。如果电机三相为不正常的电流，说明（）电源有问题。电机机械故障。地面设备有故障。 Data files of which three tablespaces can be recovered by performing an openrecovery？（） TEMP。 UNDO。 INDEX。 SYSAUX。 SYSTEM。下面关于代理移动IP和移动IP的关系描述正确的有（）代理移动IP是由移动IP发展而来。代理移动IP中的LMA也可以充当移动IP中的HA。代理移动IP是为了解决区域移动时保持IP地址不变的问题。代理移动IP和移动IP不能同时使用。 What are the consequences of executing the SHUTDOWN ABORT command？（） The database files are synchronized.。 Uncommitted changes are not rolled back.。 The database is closed， but the instance is still started.。 Database buffers and redo buffers are not written to the disk.。 The database undergoes automatic media recovery during the next startup.。

You issue the following RMAN command to set a retention policy on a database： RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2；
What will be the outcome of the above command？（）

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[单选] You issue the following RMAN command to set a retention policy on a database： RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2； What will be the outcome of the above command？（）

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[单选]
You issue the following RMAN command to set a retention policy on a database： RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2；
What will be the outcome of the above command？（）