Multiple choice technology architecture

What files does a differential backup save ?

  1. All files irrespective of whether they were changed or not

  2. All files that were changed or added since the last full backup

  3. All files that were not saved during the previous incremental backup

  4. All files that were added since the last differential backup
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A differential backup saves all files that have been changed or added since the last FULL backup (not since the last differential backup). This is different from an incremental backup, which only saves files changed since the last backup of any type. Option A describes a full backup, option C is nonsensical, and option D incorrectly suggests differential backups only reference the last differential backup.

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