Question 1,684 of 1,663
DBS-C01 Deployment and Migration Practice Question
A company is deploying an Amazon Aurora MySQL database with read replicas. They need to ensure high availability and disaster recovery across AWS Regions. Which THREE components should be included?
⚠ Common exam trap
Candidates often confuse Auto Scaling groups (which scale compute resources) with database replication or failover mechanisms, or they mistakenly think CloudFront can serve as a database-level disaster recovery solution when it only caches content at the edge.
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
✓
Aurora Replicas in the same Region
Aurora Replicas in the same Region provide read scaling and automatic failover within an AWS Region. They share the same underlying storage volume as the primary instance, so failover is fast (typically under 30 seconds) and does not require data rehydration. This is a core component for high availability within a single Region.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Aurora Replicas in the same Region
Why this is correct
Aurora Replicas provide high availability within the region.
- ✓
Aurora Global Database
Why this is correct
Global Database enables cross-region replication for disaster recovery.
- ✗
Auto Scaling groups
Why it's wrong here
Auto Scaling is for EC2 instances, not database.
- ✓
Amazon Route 53 with health checks and failover policy
Why this is correct
Route 53 can redirect traffic in case of region failure.
- ✗
Amazon CloudFront
Why it's wrong here
CloudFront is a CDN, not for database disaster recovery.
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 |
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Last reviewed: Jun 24, 2026
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services 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 DBS-C01 exam.
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