- A
AWS CloudTrail
Why wrong: AWS CloudTrail records all API activity in your account but does not automatically analyze the logs for anomalies or raise alerts for suspicious usage patterns. While you can enable CloudTrail Insights to detect unusual API activity, the question specifically asks for a managed threat detection service, which is not CloudTrail's primary function.
- B
Amazon GuardDuty
Amazon GuardDuty is the correct choice. It is a managed threat detection service that uses machine learning, anomaly detection, and threat intelligence feeds to monitor for unusual API activity, including compromised credentials and access from suspicious locations. GuardDuty raises findings that can be sent to AWS Security Hub or Amazon EventBridge for automated response.
- C
AWS Trusted Advisor
Why wrong: AWS Trusted Advisor inspects your AWS environment and provides best practice recommendations in categories such as cost optimization, performance, security, and fault tolerance. However, it does not continuously monitor API activity or detect compromised credentials; it performs periodic checks based on static rules.
- D
Amazon Inspector
Why wrong: Amazon Inspector is an automated vulnerability management service that scans EC2 instances, container images, and Lambda functions for software vulnerabilities and network exposure. It does not analyze IAM user activity or API call patterns, so it cannot detect compromised credentials based on geographic anomalies.
Quick Answer
The answer is Amazon GuardDuty, as it is the managed threat detection service designed to detect unusual geographic location of IAM access key usage. GuardDuty continuously monitors AWS API activity and applies machine learning to establish a baseline of normal behavior for each IAM user; when an access key is used from a location that deviates from that baseline, it generates a security finding alerting the team to a potentially compromised credential. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of managed detection services versus manual monitoring tools like CloudTrail or Config—a common trap is choosing CloudTrail, which only logs API calls without analyzing them for anomalies. Remember that GuardDuty is the only service that automatically raises alerts for unusual geographic access patterns without requiring custom rules. A helpful memory tip: think of GuardDuty as the “guard” that spots when a key is used from a “duty” location it shouldn’t be.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 manages user access to AWS resources using IAM users. The security team wants to automatically detect if an IAM user's access key is being used from a geographic location that is unusual for that user, which could indicate a compromised credential. The team needs a managed threat detection service that monitors API activity and raises alerts for such anomalies. Which AWS service should the security team use?
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
Amazon GuardDuty
Amazon GuardDuty is a managed threat detection service that continuously monitors AWS API activity, including IAM user access key usage, and uses machine learning to establish baseline behavior. When it detects access from an unusual geographic location, it generates a finding alerting the security team to a potentially compromised credential. This directly meets the requirement for automated anomaly detection without manual configuration.
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 CloudTrail
Why it's wrong here
AWS CloudTrail records all API activity in your account but does not automatically analyze the logs for anomalies or raise alerts for suspicious usage patterns. While you can enable CloudTrail Insights to detect unusual API activity, the question specifically asks for a managed threat detection service, which is not CloudTrail's primary function.
- ✓
Amazon GuardDuty
Why this is correct
Amazon GuardDuty is the correct choice. It is a managed threat detection service that uses machine learning, anomaly detection, and threat intelligence feeds to monitor for unusual API activity, including compromised credentials and access from suspicious locations. GuardDuty raises findings that can be sent to AWS Security Hub or Amazon EventBridge for automated response.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Trusted Advisor
Why it's wrong here
AWS Trusted Advisor inspects your AWS environment and provides best practice recommendations in categories such as cost optimization, performance, security, and fault tolerance. However, it does not continuously monitor API activity or detect compromised credentials; it performs periodic checks based on static rules.
- ✗
Amazon Inspector
Why it's wrong here
Amazon Inspector is an automated vulnerability management service that scans EC2 instances, container images, and Lambda functions for software vulnerabilities and network exposure. It does not analyze IAM user activity or API call patterns, so it cannot detect compromised credentials based on geographic anomalies.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS CloudTrail's logging capability with active threat detection, not realizing that CloudTrail only records events and requires an additional service like GuardDuty to analyze and alert on anomalies.
Detailed technical explanation
How to think about this question
GuardDuty uses integrated threat intelligence feeds and machine learning models to analyze CloudTrail management events, VPC Flow Logs, and DNS logs. For IAM user anomaly detection, it specifically examines the source IP address geolocation against the user's historical access patterns, and can trigger findings like 'UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration' or 'Recon:IAMUser/UserPermissions' when deviations occur. This service operates as a regional service but aggregates findings across accounts via AWS Organizations for centralized monitoring.
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.
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Security and Compliance — study guide chapter
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FAQ
Questions learners often ask
What does this CLF-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: Amazon GuardDuty — Amazon GuardDuty is a managed threat detection service that continuously monitors AWS API activity, including IAM user access key usage, and uses machine learning to establish baseline behavior. When it detects access from an unusual geographic location, it generates a finding alerting the security team to a potentially compromised credential. This directly meets the requirement for automated anomaly detection without manual configuration.
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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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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