ExpertHard1 markMultiple Choice
CPA · Question 06 · Area I: Information Systems
An auditor is evaluating the design of a disaster recovery plan (DRP). The organization uses a 'differential' backup strategy during the week and a 'full' backup on weekends. If the system crashes on Thursday afternoon, which files are required to restore the system to the most recent state?
An auditor is evaluating the design of a disaster recovery plan (DRP). The organization uses a 'differential' backup strategy during the week and a 'full' backup on weekends. If the system crashes on Thursday afternoon, which files are required to restore the system to the most recent state?
Answer options:
A.
The last full backup and the differential backup from Wednesday night.
B.
The last full backup and all daily differential backups from Monday, Tuesday, and Wednesday.
C.
The last full backup and the differential backup from Wednesday night.
D.
Only the differential backup from Wednesday night.
How to approach this question
Understand the difference between Incremental (changes since last backup of any kind) and Differential (changes since last FULL backup). Differential restoration is faster because you only need two files.
Full Answer
A.The last full backup and the differential backup from Wednesday night.✓ Correct
C
A differential backup records all data that has changed since the last full backup. To restore, you need the last full backup and the *most recent* differential backup. You do not need the intermediate differentials.
Common mistakes
Confusing Differential with Incremental (where you need the full + every daily tape).
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