- A
kms:Encrypt
Option A is correct because the application needs the kms:Encrypt permission to encrypt log data with the KMS key when writing to the log group.
- B
kms:GenerateDataKey
Why wrong: Option B is incorrect because CloudWatch Logs does not use envelope encryption; it uses direct encryption with the KMS key, so kms:GenerateDataKey is not needed.
- C
kms:CreateGrant
Why wrong: Option C is incorrect because kms:CreateGrant is used to delegate access to the key temporarily, not for writing logs.
- D
kms:Decrypt
Why wrong: Option D is incorrect because kms:Decrypt is needed for reading encrypted logs, not writing.
Question 1,709 of 1,750
DOP-C02 Security and Compliance Practice Question
This DOP-C02 practice question tests your understanding of security and compliance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company uses Amazon CloudWatch Logs to store application logs. The security team requires that logs be encrypted at rest using a customer-managed AWS KMS key. The team has enabled encryption on the CloudWatch Logs log group using a KMS key. However, after enabling encryption, the application fails to write logs to the log group. The application uses an IAM role that has the following permissions: logs:CreateLogStream, logs:PutLogEvents, and logs:DescribeLogStreams. Which additional permission does the application need?
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
✓
kms:Encrypt
Option A is correct because to write to an encrypted CloudWatch Logs log group, the IAM role needs kms:Encrypt permission on the KMS key to encrypt log data at rest. Option B is incorrect because kms:GenerateDataKey is not required; CloudWatch Logs does not use envelope encryption with data keys. Option C is incorrect because kms:CreateGrant is used to grant temporary access to a KMS key, not for writing logs. Option D is incorrect because kms:Decrypt is used for reading encrypted logs, not writing them.
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.
- ✓
kms:Encrypt
Why this is correct
Option A is correct because the application needs the kms:Encrypt permission to encrypt log data with the KMS key when writing to the log group.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
kms:GenerateDataKey
Why it's wrong here
Option B is incorrect because CloudWatch Logs does not use envelope encryption; it uses direct encryption with the KMS key, so kms:GenerateDataKey is not needed.
- ✗
kms:CreateGrant
Why it's wrong here
Option C is incorrect because kms:CreateGrant is used to delegate access to the key temporarily, not for writing logs.
- ✗
kms:Decrypt
Why it's wrong here
Option D is incorrect because kms:Decrypt is needed for reading encrypted logs, not writing.
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 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.
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.
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Security and Compliance — study guide chapter
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: kms:Encrypt — Option A is correct because to write to an encrypted CloudWatch Logs log group, the IAM role needs kms:Encrypt permission on the KMS key to encrypt log data at rest. Option B is incorrect because kms:GenerateDataKey is not required; CloudWatch Logs does not use envelope encryption with data keys. Option C is incorrect because kms:CreateGrant is used to grant temporary access to a KMS key, not for writing logs. Option D is incorrect because kms:Decrypt is used for reading encrypted logs, not writing them.
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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Last reviewed: Jun 20, 2026
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