多项选择题
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
单项选择题 Examine the CREATE DISKGROUP command used to create a disk group: In which situation would you use this method of disk group creation?（）
单项选择题 You executed the following commands in a database session: What could have caused the recycle bin to clean up?（）
单项选择题 View the exhibit and examine the TRANS tables storage information. After a massive delete operation, you executed the following statement to shrink the TRANS table: SQL> ALTER TABLE trans SHRINK SPACE CASCADE; Which statement describes the outcome of the command?（）