A customer is using the GFS backup rotation plan with the weekly backups occuring Friday
evening. The customer needs to restore a file that was known to be good on Friday morning. From
which backup should the customer restore?

A.
Father

B.
Differential

C.
Grandfather

D.
Son

Explanation:
Industry Standard Architecture – Student Guide 2 – Page 302:
Grandfather-Father-Son tape rotation
The system administrator typically performs a full backup every Monday (father) and incremental
backups on Tuesdays, Wednesdays, and Thursdays (sons). The administrator performs another
full backup at the end of the week (father) and another at the end of the month (grandfather).