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SK0-004 · Question #879

A backup administrator has created a schedule to run a full backup on Friday and an incremental backup Monday through Thursday. On which of the following days of the week will the backup clear the…

The correct answer is C. Friday only. Full backups reset the archive bit on all backed-up files, while incremental backups use the archive bit to identify changed files but do not reset it.

Security and disaster recovery

Question

A backup administrator has created a schedule to run a full backup on Friday and an incremental backup Monday through Thursday. On which of the following days of the week will the backup clear the archive bit on files during the backup?

Options

  • AMonday through Thursday
  • BMonday only
  • CFriday only
  • DMonday through Friday

How the community answered

(49 responses)
  • A
    2% (1)
  • B
    8% (4)
  • C
    88% (43)
  • D
    2% (1)

Why each option

Full backups reset the archive bit on all backed-up files, while incremental backups use the archive bit to identify changed files but do not reset it.

AMonday through Thursday

Incremental backups running Monday through Thursday read the archive bit to identify changed files but do not reset it, so no archive bits are cleared on those days.

BMonday only

Monday only is incorrect because incremental backups on no single day clear the archive bit - that operation is performed only by a full backup.

CFriday onlyCorrect

Friday is the day the full backup runs, and a full backup clears the archive bit on every file it backs up to indicate those files have been captured. Incremental backups read the archive bit to identify changed files but do not clear it - that reset function belongs exclusively to the full backup type. Therefore, only Friday's scheduled full backup will clear the archive bit.

DMonday through Friday

Monday through Friday is incorrect because the incremental backups running Monday through Thursday do not clear the archive bit; only the full backup on Friday performs that operation.

Concept tested: Full backup archive bit reset behavior

Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/wbadmin

Topics

#backup types#archive bit#incremental backup#full backup

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