Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find that the performance of the database goes down initially until the time the addition or removal process is completed, and then gradually becomes normal.
Which two activities would you perform to maintain a consistent performance of the database while adding or removing disks?（）

You are working on a 24X7 database. You want to design a backup strategy for your database that uses user managed backups. You want to be able to perform all backups while the database remains online.
Which statement about performing user-managed backups in a 24x7 environment is true?（）

You are the network administrator for Test King. All network servers run Windows
Server 2003.
You perform a full backup of the network every Monday. You perform incremental
backups on Tuesday, Wednesday, Thursday, and Friday. Backups are always
performed at 1:00 A.M.
On Friday afternoon, a user accidentally deletes a file.
You need to restore the file.
What should you do?（）

In Recovery Manager (RMAN), you are taking image copies of the datafiles of your production database and rolling them forward as regular intervals. You attempt to restart your database instance after a regular maintenance task, you realize that one of the data files that belongs to the USERS tablespace is damaged and you need to recover the datafile by using the image copy. You could perform the following steps to accomplish this:
1) Mount the database
2) Take the data file offline
3) Bring the data file online
4) Use the RMAN SWITCH TO command to switch the image copy
5) Apply the archived redo logs
6) Open the database
7) Use the RMAN RESTORE TO command to switch to the image copy
Which two options illustrate the correct sequence of steps that you could follow?（） (Choose two.)