—________________ about it now?

—Every time a customer has complained we've followed our store policy and offered them an exchange or a full refund.

The ability to switch between different applications stored in memory is called .

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 need to turn on Tracing for a page that is not performing well. You must store the trace information in a database for reporting and trending.
Which two actions should you perform?（）

A database is stored in an Automatic Storage Management (ASM) disk group, disk group, DGROUP1 with SQL:
There is enough free space in the disk group for mirroring to be done.
What happens if the CONTROLLER1 failure group becomes unavailable due to error of for maintenance?（）