DBS-C01 Database Security Practice Question
Network Topology
A security auditor reviews the output of a DynamoDB table description command as shown in the exhibit. Which statement accurately describes the encryption configuration of the Users table?
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
✓
The table is encrypted using a customer managed KMS key.
The output shows SSEDescription with Status ENABLED, SSEType KMS, and a KMSMasterKeyArn, which indicates that the table is encrypted using a customer-managed KMS key. Option A is incorrect because AWS managed KMS keys do not have an ARN like the one shown; they would have an alias like 'aws/dynamodb'. Option B is incorrect because DynamoDB does not use S3 managed keys; the SSEType is KMS. Option C is incorrect because the status is ENABLED, indicating encryption at rest is enabled.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The table is encrypted using an AWS managed KMS key.
Why it's wrong here
The KMS key ARN is a customer managed key (AWS managed keys have ARN ending in 'alias/aws/dynamodb').
- ✗
The table uses server-side encryption with an S3 managed key.
Why it's wrong here
DynamoDB does not use S3 managed keys; it uses KMS.
- ✗
The table is not encrypted at rest.
Why it's wrong here
The SSEDescription shows Status ENABLED, meaning encryption is enabled.
- ✓
The table is encrypted using a customer managed KMS key.
Why this is correct
The output shows a specific KMS key ARN, indicating a customer managed key.
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.