The answer is AWS CloudTrail, as it is the only AWS service that provides a complete, immutable record of all API calls made to your environment, including every IAM policy change. CloudTrail captures the identity of the caller (the IAM user or role), the exact request parameters (showing what the policy change was), and the precise timestamp of the event, enabling a full audit over the past 90 days. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish between CloudTrail for API-level auditing and services like AWS Config, which tracks resource configuration changes but does not record who made the call or the specific API request details. A common trap is confusing CloudTrail with CloudWatch Logs or IAM Access Analyzer; remember that only CloudTrail gives you the “who, what, when” for every API action. Memory tip: think of CloudTrail as the “call log” for every AWS API call, while Config is the “state snapshot” of your resources.
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 DevOps engineer needs to audit changes to IAM policies over the past 90 days. The engineer wants to see who made the change, what the change was, and when it occurred. Which AWS tool should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS CloudTrail
AWS CloudTrail is the correct choice because it records all API calls made to the AWS environment, including IAM policy changes, and stores them as events with details such as the identity of the caller (IAM user or role), the time of the request, and the request parameters. By querying CloudTrail logs over the past 90 days, the DevOps engineer can audit who made the change, what the change was (e.g., the specific IAM policy document modification), and when it occurred.
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.
✗
AWS Config
Why it's wrong here
AWS Config records configuration changes but does not capture the identity of the user who made the change.
✗
Amazon CloudWatch Logs
Why it's wrong here
CloudWatch Logs stores log files but does not natively capture API call details.
✓
AWS CloudTrail
Why this is correct
CloudTrail records all API calls, providing the user, timestamp, and details of the change.
Related concept
Read the scenario before looking for a memorised answer.
✗
IAM Access Analyzer
Why it's wrong here
Access Analyzer helps identify resources shared with external entities, not audit policy changes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Config's ability to track configuration changes with CloudTrail's ability to provide a detailed audit trail of API calls, leading them to choose AWS Config for auditing who made a change, when in fact Config only shows the state change, not the identity of the actor.
Detailed technical explanation
How to think about this question
CloudTrail records IAM policy changes as management events, which are enabled by default and stored in the CloudTrail event history for 90 days without additional configuration. For longer retention or advanced analysis, logs can be delivered to an S3 bucket and queried using Amazon Athena, allowing the engineer to run SQL queries to filter by event name (e.g., PutRolePolicy, PutUserPolicy) and user identity. A subtle behavior is that CloudTrail captures the before-and-after state of the policy only if the change is made via the AWS Management Console, SDK, or CLI; direct modifications to the underlying policy document in S3 are not captured unless the change triggers an API call.
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.
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
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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: AWS CloudTrail — AWS CloudTrail is the correct choice because it records all API calls made to the AWS environment, including IAM policy changes, and stores them as events with details such as the identity of the caller (IAM user or role), the time of the request, and the request parameters. By querying CloudTrail logs over the past 90 days, the DevOps engineer can audit who made the change, what the change was (e.g., the specific IAM policy document modification), and when it occurred.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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