Which three tasks can be performed using a duplicate database? （）(Choose three.)<br>A:Testing the backup and recovery procedures<br>B:Testing the upgrade of an Oracle database to a new release<br>C:Testing the effect of an application changes on database performance<br>D:Continuously updating archive log files from the target database to support failover

Which three tasks can be performed using a duplicate database? （）(Choose three.)
A:Testing the backup and recovery procedures
B:Testing the upgrade of an Oracle database to a new release
C:Testing the effect of an application changes on database performance
D:Continuously updating archive log files from the target database to support failover

出自：Oracle认证

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