DBS-C01 Management and Operations Practice Question
Which TWO of the following are valid methods to secure data at rest for an Amazon RDS for MySQL DB instance?
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
✓
Enable encryption at rest using AWS KMS.
(encryption at rest using AWS KMS) is correct because Amazon RDS for MySQL supports encryption at rest using AWS KMS, which encrypts the underlying storage and automated backups. Option C is incorrect because there is no '--enable-encryption' flag in the AWS CLI; the correct parameter to enable encryption during instance creation is '--storage-encrypted'. Therefore, option C does not represent a valid method. Option A is incorrect because SSL/TLS secures data in transit, not at rest. Option D is incorrect because Transparent Data Encryption (TDE) is not supported for MySQL on RDS; it is available for Oracle and SQL Server. Option E is incorrect because Amazon RDS encryption is applied at the storage level, not the table level.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable SSL/TLS for connections to the DB instance.
Why it's wrong here
SSL secures data in transit, not at rest.
- ✓
Enable encryption at rest using AWS KMS.
Why this is correct
RDS supports encryption at rest using KMS.
- ✗
Use the '--enable-encryption' flag when creating the DB instance.
Why it's wrong here
The '--enable-encryption' flag does not exist in the AWS CLI. The correct flag is '--storage-encrypted'.
- ✗
Implement Transparent Data Encryption (TDE) using Oracle-compatible settings.
Why it's wrong here
TDE is not available for RDS MySQL.
- ✗
Use Amazon RDS encryption at the table level using the ENCRYPT option.
Why it's wrong here
RDS encryption is at the storage level, not table level.
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.