RAID Level 1 mirrors the data from one disk to set of disks using which of the following
techniques?

A.
Copying the data onto another disk or set of disks.

B.
Moving the data onto another disk or set of disks.

C.
Establishing dual connectivity to another disk or set of disks.

D.
Establishing dual addressing to another disk or set of disks.

Explanation:
RAID 1 or Mirroring is a technique in which data is written to two duplicate disks
simultaneously through a copy process. This way if one of the disk drives fails, the system can
instantly switch to the other disk without any loss of data or service. Disk mirroring is used
commonly in on-line database systems where it’s critical that the data be accessible at all times.
RAID means “Redundant Array of Inexpensive Disks”.