ExpertMedium1 markMultiple Choice
CPA · Question 16 · Area I: Information Systems
What is the primary difference between a Differential Backup and an Incremental Backup?
What is the primary difference between a Differential Backup and an Incremental Backup?
Answer options:
A.
Differential backs up changes since the last backup of any type; Incremental backs up changes since the last full backup.
B.
Differential backs up changes since the last full backup; Incremental backs up changes since the last backup of any type.
C.
Differential takes longer to restore than Incremental.
D.
Incremental backs up the entire database every time.
How to approach this question
Recall the reference point for each backup type.
Full Answer
B.Differential backs up changes since the last full backup; Incremental backs up changes since the last backup of any type.✓ Correct
Differential backs up changes since the last full backup; Incremental backs up changes since the last backup of any type.
Incremental backups save data changed since the *last backup* (whether full or incremental). Differential backups save data changed since the *last FULL backup*. This means differentials grow larger over time but are faster to restore.
Common mistakes
Swapping the definitions.
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