Which of the following backup types backs up files that have been added and all data that have been modified since the most recent backup was performed?

Question

Options

• ADifferential backup
• BIncremental backup
• CDaily backup
• DFull backup

• A
  4% (1)
• B
  91% (21)
• C
  4% (1)

Explanation

Incremental backup captures only the files added or modified since the most recent backup - whether that was a full or another incremental backup. This matches the question's definition exactly, making B correct.

Why the distractors are wrong:

• A (Differential): Also captures changes since the last backup, but specifically since the last full backup - not the most recent backup overall. Each differential grows larger over time.
• C (Daily): Backs up only files with a modification date matching today's date - it's time-based, not change-tracking-based.
• D (Full): Backs up everything regardless of when it was last modified or backed up.

Memory tip: Think "Incremental = Increments from the last backup" - each backup is a small step building on the previous one. Differential starts fresh from the last Full - both words start with a consonant to remind you it resets to the Full baseline.

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