The answer is that the EC2 instance lacks an IAM role with CloudWatch Logs write permissions. The CloudWatch agent relies on the instance’s attached IAM role to obtain temporary credentials for API calls; without a policy granting logs:PutLogEvents, logs:CreateLogGroup, and logs:CreateLogStream, the agent cannot authenticate or send log data to CloudWatch Logs. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of how IAM roles govern service-to-service communication—a common trap is assuming the agent configuration or the console interface is at fault, when the real issue is missing permissions. Remember that the agent itself is installed correctly on EC2, and log groups are created automatically if they don’t exist, so the IAM role is the single point of failure. A useful memory tip: “No role, no roll—logs won’t roll into CloudWatch without the write policy.”
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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.
An application running on Amazon EC2 generates logs that need to be streamed to Amazon CloudWatch Logs. The developer installs and configures the CloudWatch agent. However, logs are not appearing in the log group. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The EC2 instance does not have an IAM role with CloudWatch Logs write permissions.
The CloudWatch agent requires an IAM role with permissions to write logs. Without the proper permissions, the agent cannot send logs. Option A is correct. Option B is wrong because the agent can be installed on EC2. Option C is wrong because the log group is created automatically if not existing. Option D is wrong because the agent is configured via a config file, not the console.
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.
✓
The EC2 instance does not have an IAM role with CloudWatch Logs write permissions.
Why this is correct
The agent needs permissions to put log events.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The CloudWatch agent cannot be installed on Amazon Linux 2.
Why it's wrong here
It can be installed on Amazon Linux 2.
✗
The CloudWatch agent must be configured from the AWS Management Console.
The log group must be created manually before the agent can send logs.
Why it's wrong here
The agent can create the log group automatically.
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 DVA-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.
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The EC2 instance does not have an IAM role with CloudWatch Logs write permissions. — The CloudWatch agent requires an IAM role with permissions to write logs. Without the proper permissions, the agent cannot send logs. Option A is correct. Option B is wrong because the agent can be installed on EC2. Option C is wrong because the log group is created automatically if not existing. Option D is wrong because the agent is configured via a config file, not the console.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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