The correct approach is to specify a KMS key ID in the CloudTrail trail configuration and grant CloudTrail permissions to use the key. This works because CloudTrail natively supports server-side encryption with AWS KMS (SSE-KMS) using a customer-managed key, ensuring logs are encrypted at rest with full control over key rotation and access policies. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of CloudTrail’s encryption options and the common trap of confusing SSE-S3 (S3-managed keys) with SSE-KMS—remember that CloudTrail cannot use SSE-C or client-side encryption. A key memory tip is “KMS for control, S3 for default”: if you need a customer-managed key, you must explicitly configure the KMS key ID and attach the required permissions to CloudTrail’s service principal.
DOP-C02 Security and Compliance Practice Question
This DOP-C02 practice question tests your understanding of security and compliance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 DevOps engineer is configuring AWS CloudTrail to log all management events across all regions. The engineer wants to ensure that log files are encrypted at rest using a customer-managed KMS key. What is the correct way to achieve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Specify a KMS key ID in the CloudTrail trail configuration and grant CloudTrail permissions to use the key.
Option B is correct because CloudTrail supports SSE-KMS with a customer-managed key. Option A is wrong because SSE-S3 uses S3-managed keys. Option C is wrong because SSE-C requires customer-provided keys, which is not supported by CloudTrail. Option D is wrong because CloudTrail does not support client-side encryption.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use SSE-C with a customer-provided key when uploading logs to S3.
Why it's wrong here
CloudTrail does not support SSE-C.
✗
Enable client-side encryption before delivering logs to S3.
Why it's wrong here
CloudTrail does not support client-side encryption.
✗
Enable default encryption on the S3 bucket using SSE-S3.
Why it's wrong here
SSE-S3 uses S3-managed keys, not customer-managed.
✓
Specify a KMS key ID in the CloudTrail trail configuration and grant CloudTrail permissions to use the key.
Why this is correct
Correct: CloudTrail can use a customer-managed KMS key for encryption.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Specify a KMS key ID in the CloudTrail trail configuration and grant CloudTrail permissions to use the key. — Option B is correct because CloudTrail supports SSE-KMS with a customer-managed key. Option A is wrong because SSE-S3 uses S3-managed keys. Option C is wrong because SSE-C requires customer-provided keys, which is not supported by CloudTrail. Option D is wrong because CloudTrail does not support client-side encryption.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DOP-C02 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 DOP-C02 exam.
Question Discussion
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