ISC2 CC Business Continuity, DR & Incident Response Practice Question
A company is developing a disaster recovery plan for its database server. The database is updated transactionally and cannot tolerate any data loss. Which backup strategy meets this requirement?
⚠ Common exam trap
ISC2 often tests the distinction between synchronous and asynchronous replication methods, and the trap here is that candidates confuse log shipping or differential backups (which have inherent recovery point gaps) with true zero-data-loss solutions like continuous database mirroring.
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
✓
Continuous database mirroring
Continuous database mirroring (C) is correct because it maintains a synchronous copy of the database on a secondary server, ensuring that every committed transaction is immediately written to both servers. This provides zero data loss (RPO=0) and automatic failover, which is required for a transactional database that cannot tolerate any data loss.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Log shipping with 15-minute intervals
Why it's wrong here
Allows up to 15 minutes of data loss.
- ✗
Full backups nightly
Why it's wrong here
Allows up to 24 hours of data loss.
- ✓
Continuous database mirroring
Why this is correct
Provides real-time replication with zero data loss.
- ✗
Differential backups every 6 hours
Why it's wrong here
Allows up to 6 hours of data loss.
Go deeper
Related to this question
Learn chapter
Business Continuity and Disaster Recovery
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.
Key term
Disaster recovery plan
A Disaster Recovery Plan (DRP) is a documented, structured approach that outlines how an organization can quickly resume critical IT systems and operations after a disruptive event.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CC exam.