DBS-C01 Deployment and Migration Practice Question
A company is deploying a MySQL database on Amazon RDS and needs to enforce encryption at rest. Which configuration step is required?
⚠ Common exam trap
Many candidates confuse encryption at rest with encryption in transit (SSL/TLS), leading them to select options that enable SSL rather than the required storage-level encryption.
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
✓
Select encryption option when creating the RDS instance.
Amazon RDS for MySQL requires encryption at rest to be enabled at instance creation time by selecting the encryption option in the AWS Management Console, CLI, or API. Encryption at rest uses AWS Key Management Service (KMS) to encrypt the underlying storage, automated backups, read replicas, and snapshots. This setting cannot be applied to an existing unencrypted DB instance, so it must be chosen during the initial launch.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a custom DB parameter group with SSL enabled.
Why it's wrong here
Parameter group doesn't control encryption at rest.
- ✗
Modify the DB instance to enable encryption after creation.
Why it's wrong here
Encryption can only be enabled at creation time.
- ✗
Enable SSL/TLS on the RDS instance.
Why it's wrong here
SSL/TLS is for in-transit encryption.
- ✓
Select encryption option when creating the RDS instance.
Why this is correct
Encryption at rest is enabled at launch.
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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JA
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.