ISC2 CC Practice Question: Business Continuity, Disaster Recovery, and Incident Response
A company has a Recovery Point Objective (RPO) of 1 hour for its financial database. It performs full backups every night at 11 PM and incremental backups every 4 hours. If the system fails at 2:30 PM, what is the maximum data loss in terms of time?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
3.5 hours
The last backup was the incremental backup at 11 AM (assuming 4-hour intervals from 11 PM). The failure at 2:30 PM means data from 11 AM to 2:30 PM (3.5 hours) could be lost, which exceeds the 1-hour RPO.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1 hour
Why it's wrong here
This is less than the actual possible loss.
- ✗
15.5 hours
Why it's wrong here
This would be if no incremental backup existed.
- ✓
3.5 hours
Why this is correct
Data from the last incremental backup at 11 AM to the failure at 2:30 PM could be lost.
- ✗
1.5 hours
Why it's wrong here
Incorrect calculation.
Go deeper
Related to this question
Learn chapter
Business Continuity and Disaster Recovery
Key term
Business Continuity Planning
Business Continuity Planning is the process of creating a strategy to keep an organization's essential functions running during and after a major disruption.
Key term
RPO
Recovery Point Objective (RPO) is the maximum acceptable amount of data loss measured in time, defining how recent data must be to resume operations after a disruption.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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