Your customer has the following backup strategy:
Sunday to Thursday -> Daily Incremental
Friday -> Weekly Full
No backup is run on a Saturday
Backup window is 22:00 – 04:00
They suffer a catastrophic failure on Thursday at 05:30. Which backup sets are required to restore the failed
system to the most recent state?

A.
last full backup plus all incremental backups

B.
last full backup plus the last incremental backup

C.
last incremental backup only

D.
last full backup only

Explanation:
An incremental backup is one that provides a backup of files that have changed or are new since the last
incremental backup; it is one that backs up only the data that have changed since the last backup — be it a full
or incremental backup.
https://en.wikipedia.org/wiki/Incremental_backup