QUESTION 73
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 newrelease
C. Testing the effect of an application changes on database performance
D. Continuously updating archive log files from the target database to support failover
Answer: ABC
同650题：http://blog.csdn.net/rlhua/article/details/13509865
Explanation/Reference:
Section: Database Architecture & Resource Management, RAC, ASM