CV0-004 Operations and Support Practice Question
A cloud architect is designing a disaster recovery plan for a critical application with an RTO of 15 minutes and an RPO of 1 minute. The application runs on AWS EC2 instances with data stored on EBS volumes. Which replication strategy best meets these requirements?
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 replication using AWS Elastic Disaster Recovery
Continuous replication (e.g., using AWS Elastic Disaster Recovery) provides near-synchronous replication with very low RPO. Snapshot-based replication has higher RPO. Cross-region replication for S3 is for object storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
EBS snapshots replicated to another region every hour
Why it's wrong here
Hourly snapshots give an RPO of up to 1 hour, exceeding 1 minute.
- ✓
Continuous replication using AWS Elastic Disaster Recovery
Why this is correct
Continuous replication provides low RPO (seconds to minutes) and fast RTO.
- ✗
Daily AMI backups stored in a different region
Why it's wrong here
Daily backups far exceed the required RPO.
- ✗
Cross-region replication of S3 buckets
Why it's wrong here
Not applicable to EBS volumes; S3 replication is for object storage.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.