Which three tasks can be performed using a duplicate da…

Which three tasks can be performed using a duplicate database? (Choose three.)

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



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