The answer is AWS CloudTrail. This service is the correct choice because it functions as the auditing and monitoring backbone for your AWS account, recording every API call made via the AWS Management Console, SDKs, CLI, or other services. CloudTrail captures the identity of the caller, the source IP address, and the exact timestamp of each request, giving you a complete history of who did what, from where, and when. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of governance and compliance services, often appearing as a direct comparison with Amazon CloudWatch, which monitors performance metrics and logs, not API activity. A common trap is confusing CloudTrail with CloudWatch—remember that CloudTrail trails API calls, while CloudWatch watches resource utilization. For a quick memory tip, think of the word "trail" as in "following the trail of breadcrumbs" left by every API action in your account.
CLF-C02 Security and Compliance Practice Question
This CLF-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.
Which AWS service allows you to monitor API calls made in your AWS account, including who made the call, from which IP address, and when?
Why wrong: CloudWatch monitors performance metrics and logs — it doesn't record API call history with identity and source IP attribution.
B
AWS CloudTrail
CloudTrail records every API call including who made it, from what IP, at what time, on what resource, with what parameters — the core audit trail for AWS accounts.
C
VPC Flow Logs
Why wrong: VPC Flow Logs capture network traffic metadata — they don't record AWS management API calls with caller identity.
D
AWS Config
Why wrong: Config records resource configuration changes — CloudTrail is the source of who made what API call and when.
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 service that records API activity in your AWS account, capturing details such as the identity of the caller, the source IP address, and the timestamp of each API call. This makes it the correct choice for monitoring who made a call, from where, and when.
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.
✗
Amazon CloudWatch
Why it's wrong here
CloudWatch monitors performance metrics and logs — it doesn't record API call history with identity and source IP attribution.
✓
AWS CloudTrail
Why this is correct
CloudTrail records every API call including who made it, from what IP, at what time, on what resource, with what parameters — the core audit trail for AWS accounts.
Related concept
Read the scenario before looking for a memorised answer.
✗
VPC Flow Logs
Why it's wrong here
VPC Flow Logs capture network traffic metadata — they don't record AWS management API calls with caller identity.
✗
AWS Config
Why it's wrong here
Config records resource configuration changes — CloudTrail is the source of who made what API call and when.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CloudWatch (for monitoring metrics and logs) with CloudTrail (for auditing API calls), because both involve logging, but CloudTrail is specifically designed for recording API activity with caller identity and source IP details.
Detailed technical explanation
How to think about this question
CloudTrail delivers log files to an S3 bucket (or CloudWatch Logs) in JSON format, with each event containing fields like userIdentity, sourceIPAddress, eventTime, and eventSource. A real-world scenario is auditing an IAM user who deleted an S3 bucket; CloudTrail reveals the exact time, the user's ARN, and the IP address used, which is critical for security investigations and compliance reporting.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
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: AWS CloudTrail — AWS CloudTrail is the service that records API activity in your AWS account, capturing details such as the identity of the caller, the source IP address, and the timestamp of each API call. This makes it the correct choice for monitoring who made a call, from where, and when.
What should I do if I get this CLF-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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Question Discussion
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