DBS-C01 Deployment and Migration Practice Question
Which THREE considerations are important when deploying Amazon Aurora Global Database? (Choose 3.)
⚠ Common exam trap
Test-takers frequently confuse Aurora Global Database with standard cross-region read replica setups (which use MySQL binary log replication) and incorrectly assume that cross-region read replicas are not created in each secondary region, or that AWS DMS or S3 is involved.
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
✓
Each secondary region can have up to 16 read replicas
Amazon Aurora Global Database allows each secondary region to have up to 16 read replicas, enabling low-latency global reads. Option C is correct because a secondary region gets its own Aurora cluster that functions as a cross-region read replica. Option E is correct because replication between the primary and secondary regions typically completes in less than one second, ensuring near-real-time data consistency. Options A and D are incorrect: AWS DMS is not required for Aurora Global Database replication (it uses built-in storage-based replication), and transaction logs are stored in Aurora's storage layer, not in Amazon S3.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS DMS must be used to set up replication
Why it's wrong here
Incorrect. AWS DMS is not required; Aurora Global Database uses built-in storage-based replication.
- ✓
Each secondary region can have up to 16 read replicas
Why this is correct
Correct. Each secondary region can have up to 16 read replicas.
- ✓
Cross-region read replicas are created for each secondary region
Why this is correct
Correct. Each secondary region has its own Aurora cluster that acts as a cross-region read replica.
- ✗
Amazon S3 is used to store transaction logs
Why it's wrong here
Incorrect. Transaction logs are stored in the Aurora cluster's storage layer, not in Amazon S3.
- ✓
Replication is typically less than 1 second between regions
Why this is correct
Correct. Replication latency is typically less than 1 second between regions.
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 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.