DEA-C01 Data Security and Governance Practice Question
A company uses Amazon DynamoDB to store session data. The security team requires that all data be encrypted at rest using a customer-managed KMS key. The data engineer has enabled DynamoDB encryption with a customer-managed key. However, the security team notices that the key is not being used for all tables; some tables still use the default AWS-managed key. The engineer needs to ensure that all new tables are automatically encrypted with the customer-managed key. The company has hundreds of developers who create tables using various methods (console, CLI, SDK, CloudFormation). What is the most efficient way to enforce this policy?
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
✓
Use an AWS Config rule to check for tables not using the customer-managed key and trigger auto-remediation.
AWS Config rules can evaluate whether DynamoDB tables use customer-managed KMS keys and take remediation actions. Option A is wrong because it requires updating all existing code. Option B is wrong because CloudFormation templates can be bypassed. Option D is wrong because SCPs cannot enforce encryption configuration for DynamoDB.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a CloudFormation template that all developers must use to create tables.
Why it's wrong here
Developers can still use other methods.
- ✗
Attach an SCP to deny creating DynamoDB tables without the customer-managed key.
Why it's wrong here
SCPs cannot enforce table-level encryption settings.
- ✓
Use an AWS Config rule to check for tables not using the customer-managed key and trigger auto-remediation.
Why this is correct
Config can detect and remediate non-compliant resources.
- ✗
Update the company's internal documentation and require all developers to specify the KMS key in their code.
Why it's wrong here
Not enforceable automatically.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-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 DEA-C01 exam.