- A
Grant the IAM role used by the application to write logs permission to use the KMS key (kms:Encrypt, kms:Decrypt).
The writer must have permissions to use the KMS key.
- B
Associate the KMS key with the CloudWatch Logs log group by specifying the key ARN in the log group's settings.
The log group must be configured to use the KMS key.
- C
Create a customer-managed AWS KMS key in the same region as the CloudWatch Logs log group.
A customer-managed KMS key is required for encryption at rest.
- D
Enable encryption on each log stream individually.
Why wrong: Encryption is set at the log group level, not individual log streams.
- E
Enable server-side encryption on the Amazon S3 bucket where logs are exported.
Why wrong: Logs are stored in CloudWatch Logs, not S3 by default.
Quick Answer
The correct answer involves three steps: creating a customer-managed AWS KMS key in the same region as the CloudWatch Logs log group, associating that key with the log group, and granting the IAM role that writes logs permission to use the key. This is necessary because CloudWatch Logs encrypts log data at rest using server-side encryption, and when you specify a customer-managed KMS key, the service uses envelope encryption to protect your log data, with the key policy and IAM permissions controlling access. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of encryption integration between KMS and CloudWatch Logs, often appearing as a multi-select question where common traps include confusing log stream encryption (which is not supported) or assuming S3 server-side encryption applies. Remember the three-step mantra: create the key in the same region, associate it with the log group, and grant write permissions to the IAM role—think "Key, Group, Permissions" to avoid missing any step.
DOP-C02 Monitoring and Logging Practice Question
This DOP-C02 practice question tests your understanding of monitoring and logging. 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 company uses Amazon CloudWatch Logs to store application logs. The security team requires that all logs be encrypted at rest using a customer-managed AWS KMS key. Which THREE steps are necessary to meet this requirement? (Choose THREE.)
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
Grant the IAM role used by the application to write logs permission to use the KMS key (kms:Encrypt, kms:Decrypt).
Options A, B, and C are correct. A KMS key must be created (A), the CloudWatch Logs log group must be associated with the key (B), and the IAM role that writes logs must have permission to use the key (C). Option D (enable server-side encryption with S3) is not applicable because logs are stored in CloudWatch Logs, not S3. Option E (enable encryption on the log stream) is not a supported action; encryption is set at the log group level.
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.
- ✓
Grant the IAM role used by the application to write logs permission to use the KMS key (kms:Encrypt, kms:Decrypt).
Why this is correct
The writer must have permissions to use the KMS key.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Associate the KMS key with the CloudWatch Logs log group by specifying the key ARN in the log group's settings.
Why this is correct
The log group must be configured to use the KMS key.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Create a customer-managed AWS KMS key in the same region as the CloudWatch Logs log group.
Why this is correct
A customer-managed KMS key is required for encryption at rest.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable encryption on each log stream individually.
Why it's wrong here
Encryption is set at the log group level, not individual log streams.
- ✗
Enable server-side encryption on the Amazon S3 bucket where logs are exported.
Why it's wrong here
Logs are stored in CloudWatch Logs, not S3 by default.
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.
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Monitoring and Logging — study guide chapter
Learn the concepts, then practise the questions
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Monitoring and Logging practice questions
Targeted practice on this topic area only
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AWS Certified DevOps Engineer Professional DOP-C02 study guide
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DOP-C02 practice test guide
How to use practice tests most effectively before exam day
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Monitoring and Logging — This question tests Monitoring and Logging — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Grant the IAM role used by the application to write logs permission to use the KMS key (kms:Encrypt, kms:Decrypt). — Options A, B, and C are correct. A KMS key must be created (A), the CloudWatch Logs log group must be associated with the key (B), and the IAM role that writes logs must have permission to use the key (C). Option D (enable server-side encryption with S3) is not applicable because logs are stored in CloudWatch Logs, not S3. Option E (enable encryption on the log stream) is not a supported action; encryption is set at the log group level.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
3 more ways this is tested on DOP-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses Amazon CloudWatch Logs to store application logs from multiple EC2 instances. The security team requires that logs be encrypted at rest using a customer-managed KMS key. Which configuration step should the engineer perform to meet this requirement?
medium- A.Configure the CloudWatch agent to encrypt logs before sending
- B.Create a KMS key and attach a policy allowing CloudWatch Logs to use it
- C.Enable default encryption on the S3 bucket that stores logs
- ✓ D.Associate the KMS key with the CloudWatch log group using the console or CLI
Why D: Option C is correct because you must associate a KMS key with the log group to encrypt logs. Option A is wrong because the CloudWatch Agent does not handle encryption at rest. Option B is wrong because KMS key policy alone is insufficient; you must specify the key. Option D is wrong because S3 encryption does not apply to CloudWatch Logs.
Variation 2. A company is using Amazon CloudWatch Logs to store application logs. The security team requires that logs are encrypted at rest using a customer-managed AWS KMS key. Which TWO steps are necessary to achieve this?
medium- ✓ A.Use the CloudWatch Logs console or API to associate the KMS key with the log group
- B.Enable default encryption for CloudWatch Logs in the AWS account settings
- C.Update the log group's resource policy to reference the KMS key
- D.Associate the KMS key with each log stream individually
- ✓ E.Create a customer-managed KMS key with appropriate key policy that allows CloudWatch Logs to use the key
Why A: Options A and C are correct. To encrypt CloudWatch Logs with a customer-managed KMS key, you must first create the KMS key and then associate it with the log group using the CloudWatch Logs console or API. Option B is wrong because you cannot associate a key with a log stream directly; it's at the log group level. Option D is wrong because CloudWatch Logs does not support default encryption with a KMS key at the account level. Option E is wrong because the key policy must allow CloudWatch Logs to use the key, but the key policy is set on the key itself, not on the log group.
Variation 3. A company is using Amazon CloudWatch Logs to store application logs. The DevOps engineer needs to ensure that log data is encrypted at rest using a customer-managed KMS key. What step must be taken?
hard- A.Use AWS CloudTrail to encrypt the log data before it is sent to CloudWatch Logs.
- B.Create a KMS key and apply it to the IAM role used by the application.
- ✓ C.Create a new KMS customer-managed key and associate it with the CloudWatch Logs log group.
- D.Enable server-side encryption on the log group using the default CloudWatch Logs key.
Why C: Option C is correct because CloudWatch Logs supports encryption at rest using a customer-managed KMS key, which must be explicitly associated with the log group. When you create or update a log group, you can specify a KMS key ID (via the AWS CLI, SDK, or console) to encrypt all log data stored in that group. This ensures that the log data is encrypted using a key you control, not the default AWS-managed key.
Last reviewed: Jun 20, 2026
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.
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