DBS-C01 Database Security Practice Question
Which TWO of the following are methods to encrypt data at rest for an Amazon RDS for Oracle DB instance? (Select TWO.)
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 when creating the DB instance.
Options A and B are correct. Amazon RDS for Oracle supports encryption at rest via two methods: enabling encryption using AWS KMS when creating the DB instance (Option A) or using Oracle Transparent Data Encryption (TDE) with a customer-managed Oracle wallet (Option B). Option C (SSL/TLS) encrypts data in transit, not at rest. Option D (S3 SSE) is irrelevant as S3 is not used for RDS storage. Option E (client-side encryption) is an application-level approach and not a native RDS encryption method.
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 encryption at rest using AWS KMS when creating the DB instance.
Why this is correct
RDS can be launched with KMS encryption.
- ✓
Use Oracle Transparent Data Encryption (TDE) with the Oracle wallet.
Why this is correct
RDS Oracle supports TDE for encrypting data files.
- ✗
Enable SSL/TLS for the DB instance.
Why it's wrong here
SSL/TLS encrypts data in transit, not at rest.
- ✗
Configure Amazon S3 server-side encryption on the DB instance's storage.
Why it's wrong here
S3 SSE is not applicable to RDS instances.
- ✗
Use client-side encryption in the application before sending data to RDS.
Why it's wrong here
Client-side encryption is not a built-in RDS feature.
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.