Which two changes and their effect on the system can be tested by using the Database Replay feature？（）

A. It can be used to back up all data on ASM disks.
B. It can be used to recover the damaged ASM disk group along with the data.
C. It can be used to gather information about a preexisting ASM disk group with disk paths，disk name，failure groups，attributes templates，and alias directory structure.
D. It can be used to re-create the ASM disk group with its attributes.

A. Generate reports on data failure such as data file failures.
B. You can track the Service Request （SR） and implement repairs.
C. You can package and upload diagnostic data to Oracle Support.
D. You can manually run health checks to gather diagnostic data for a problem.

A. A virtual private catalog owner can create a local stored script， and have read/write access to a global stored script.
B. The virtual private catalog owner cannot create and modify the stored scripts.
C. The set of views and synonyms that make up the virtual private catalog is stored in the schema of the RMAN recovery catalog owner.
D. To perform most of the RMAN operations， the virtual catalog owner must have the SYSDBA or  SYSOPER privilege on the target database.