Which backup method usually resets the archive bit on the files after they have been backed up?

A.
Incremental backup method.

B.
Differential backup method.

C.
Partial backup method.

D.
Tape backup method.

Explanation:
The incremental backup method backs up all the files that have changed since the last full or incrementalbackup and resets the archive bit to 0. This is known as “clearing the archive bit”. A full backup backs up all
files regardless of whether the archive bit is 1 or 0 and sets the archive bit to 0.
The archive bit is used by the backup process to determine whether a file has been changed. When you modify
a file or create a new file, the archive bit is set to 1. This tells the backups process that the file has changed (or
is a new file) and needs to be backed up. When an incremental backup backs up the file, it sets the archive bit
to 0. When the next incremental backup runs and sees that the archive bit is 0, the incremental backup knows
that the file has not changed since the last backup and so will not back up the file again.
Incorrect Answers:
B: The differential backup method backs up only the files that have changed since the previous full backup.
This backup method does not reset the archive bit.
C: The partial backup method is not a method that determines whether the archive bit is reset or not; it just
specifies that a subset of data is backed up.
D: The tape backup method is not a method that determines whether the archive bit is reset or not; it just
specifies that the files are backed up to tape.

Krutz, Ronald L. and Russel Dean Vines, The CISSP Prep Guide: Mastering the Ten Domains of Computer
Security, John Wiley & Sons, New York, 2001, p. 69