How many backup copies are required to restore the requested files?

A backup administrator has defined a backup policy where full backups are scheduled at 8 PM every Saturday and differential backups for the rest of the week at same time. A data loss happened on Friday at 11 AM.

How many backup copies are required to restore the requested files?
A . 2
B . 3
C . 6
D . 7

Answer: A

Explanation:

If the data loss occurred on Friday, restoration process needs a full backup and the last differential backup that happened on a day before Friday. In case of an incremental backup, all the backup copies that occurred before Friday would be needed including the full backup copy that occurred on Saturday.