- A
Create a customer-managed KMS key, enable key rotation, and set a deletion protection policy.
KMS supports customer-managed keys with rotation and deletion protection.
- B
Enable encryption on the RDS instance and use the default KMS key.
Why wrong: The default key is AWS-managed, not customer-managed, and does not have deletion protection.
- C
Use AWS CloudHSM to generate and store the encryption key, and associate it with the RDS instance.
Why wrong: RDS encryption with KMS does not support CloudHSM keys directly.
- D
Enable AWS CloudTrail to log key deletion attempts.
Why wrong: Logging does not prevent deletion.
DBS-C01 Customer-managed KMS key Practice Question
This DBS-C01 practice question tests your understanding of database security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: customer-managed KMS key. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company has an Amazon RDS for SQL Server DB instance that stores financial data. The security team requires that the data be encrypted at rest using a customer-managed key stored in AWS KMS. Additionally, they want to ensure that the key cannot be deleted without authorization. What should be done?
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
Create a customer-managed KMS key, enable key rotation, and set a deletion protection policy.
Option A is correct. Creating a customer-managed KMS key allows you to control key rotation and deletion protection, meeting the security requirements. Option B is wrong because using the default KMS key does not provide a customer-managed key. Option C is wrong because AWS CloudHSM is not directly used for RDS encryption at rest; KMS is the required service. Option D is wrong because AWS CloudTrail only logs actions but does not prevent key deletion.
Key principle: Customer-managed KMS key
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 customer-managed KMS key, enable key rotation, and set a deletion protection policy.
Why this is correct
KMS supports customer-managed keys with rotation and deletion protection.
Related concept
Customer-managed KMS key
- ✗
Enable encryption on the RDS instance and use the default KMS key.
Why it's wrong here
The default key is AWS-managed, not customer-managed, and does not have deletion protection.
- ✗
Use AWS CloudHSM to generate and store the encryption key, and associate it with the RDS instance.
Why it's wrong here
RDS encryption with KMS does not support CloudHSM keys directly.
- ✗
Enable AWS CloudTrail to log key deletion attempts.
Why it's wrong here
Logging does not prevent deletion.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may confuse key rotation with deletion protection; both are required here. Deleting the KMS key would render encrypted data unrecoverable.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Customer-managed KMS key
- Deletion protection
- Key rotation
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Customer-managed KMS key
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review customer-managed KMS key, then practise related DBS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Database Security — This question tests Database Security — Customer-managed KMS key.
What is the correct answer to this question?
The correct answer is: Create a customer-managed KMS key, enable key rotation, and set a deletion protection policy. — Option A is correct. Creating a customer-managed KMS key allows you to control key rotation and deletion protection, meeting the security requirements. Option B is wrong because using the default KMS key does not provide a customer-managed key. Option C is wrong because AWS CloudHSM is not directly used for RDS encryption at rest; KMS is the required service. Option D is wrong because AWS CloudTrail only logs actions but does not prevent key deletion.
What should I do if I get this DBS-C01 question wrong?
Review customer-managed KMS key, then practise related DBS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Customer-managed KMS key
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Last reviewed: Jun 20, 2026
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