- A
Amazon GuardDuty
Correct. Amazon GuardDuty uses threat intelligence and machine learning to analyze continuous streams of AWS API activity (via CloudTrail), VPC Flow Logs, and DNS logs. It detects suspicious patterns, unauthorized behavior, and known malicious IP addresses, and can send near-real-time alerts.
- B
AWS CloudTrail
Why wrong: Incorrect. AWS CloudTrail records API activity for auditing, governance, and compliance purposes. It does not analyze the recorded events for threats or provide near-real-time notifications about suspicious patterns. It is a source of data for analysis, not a detection service itself.
- C
AWS Config
Why wrong: Incorrect. AWS Config evaluates and records resource configuration changes against predefined rules, but it does not analyze API activity streams for suspicious patterns or known malicious IP addresses. It focuses on configuration compliance, not threat detection.
- D
Amazon Inspector
Why wrong: Incorrect. Amazon Inspector is a vulnerability management service that scans Amazon EC2 instances for software vulnerabilities and unintended network exposure. It does not monitor AWS API activity or detect suspicious IAM user behavior.
Quick Answer
The answer is Amazon GuardDuty, the correct choice because it is purpose-built for real-time threat detection for AWS API activity, continuously analyzing streams of CloudTrail management events, VPC Flow Logs, and DNS logs using machine learning and integrated threat intelligence. This allows it to identify suspicious patterns like launching EC2 instances in unauthorized regions or modifying security groups for public SSH access, and it can trigger near-real-time notifications through Amazon EventBridge or SNS. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of which service handles continuous monitoring and anomaly detection versus services focused on logging or compliance, such as AWS CloudTrail or AWS Config. A common trap is choosing CloudTrail because it records API calls, but CloudTrail only provides the raw logs—it does not analyze them for threats or known malicious IP addresses. Remember the memory tip: GuardDuty is the guard on duty that watches for suspicious activity, while CloudTrail is just the trail of what happened.
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.
A company's security team needs to receive near-real-time notifications whenever an IAM user in their AWS account performs an action that violates a defined baseline of expected behavior. Examples include launching an Amazon EC2 instance in an unauthorized AWS Region or modifying a security group to allow public SSH access from the internet. The solution must analyze continuous streams of AWS API activity to identify suspicious patterns and known malicious IP addresses. 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 threat detection service that continuously monitors AWS API activity, including CloudTrail management events, VPC Flow Logs, and DNS logs, to identify suspicious patterns and known malicious IP addresses. It uses machine learning and integrated threat intelligence to detect anomalous behavior such as launching EC2 instances in unauthorized regions or modifying security groups for public SSH access, and can deliver near-real-time notifications via Amazon EventBridge or SNS. This makes it the correct choice for analyzing continuous streams of API activity and alerting on violations of a defined baseline.
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 GuardDuty
Why this is correct
Correct. Amazon GuardDuty uses threat intelligence and machine learning to analyze continuous streams of AWS API activity (via CloudTrail), VPC Flow Logs, and DNS logs. It detects suspicious patterns, unauthorized behavior, and known malicious IP addresses, and can send near-real-time alerts.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS CloudTrail
Why it's wrong here
Incorrect. AWS CloudTrail records API activity for auditing, governance, and compliance purposes. It does not analyze the recorded events for threats or provide near-real-time notifications about suspicious patterns. It is a source of data for analysis, not a detection service itself.
- ✗
AWS Config
Why it's wrong here
Incorrect. AWS Config evaluates and records resource configuration changes against predefined rules, but it does not analyze API activity streams for suspicious patterns or known malicious IP addresses. It focuses on configuration compliance, not threat detection.
- ✗
Amazon Inspector
Why it's wrong here
Incorrect. Amazon Inspector is a vulnerability management service that scans Amazon EC2 instances for software vulnerabilities and unintended network exposure. It does not monitor AWS API activity or detect suspicious IAM user behavior.
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 GuardDuty's threat detection, assuming that simply recording API calls is sufficient for near-real-time security analysis, but CloudTrail lacks the built-in machine learning and threat intelligence needed to identify suspicious patterns or malicious IPs automatically.
Detailed technical explanation
How to think about this question
GuardDuty ingests CloudTrail management events, VPC Flow Logs (including DNS query logs), and optionally S3 data events, then applies anomaly detection models and threat intelligence feeds (e.g., from AWS Security, CrowdStrike, and Proofpoint) to identify indicators of compromise. For example, it can detect a known malicious IP address attempting to access an EC2 instance by correlating VPC Flow Logs with threat intelligence, or flag an IAM user creating resources in an unauthorized region by analyzing CloudTrail event patterns. The service generates findings that include severity levels and detailed evidence, which can be sent to a security incident response system within minutes.
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.
- →
Security and Compliance — study guide chapter
Learn the concepts, then practise the questions
- →
Security and Compliance practice questions
Targeted practice on this topic area only
- →
All CLF-C02 questions
1,024 questions across all exam domains
- →
AWS Certified Cloud Practitioner CLF-C02 study guide
Full concept coverage aligned to exam objectives
- →
CLF-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related CLF-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Cloud Concepts practice questions
Practise CLF-C02 questions linked to Cloud Concepts.
Security and Compliance practice questions
Practise CLF-C02 questions linked to Security and Compliance.
Cloud Technology and Services practice questions
Practise CLF-C02 questions linked to Cloud Technology and Services.
Billing, Pricing, and Support practice questions
Practise CLF-C02 questions linked to Billing, Pricing, and Support.
AWS shared responsibility model practice questions
Practise CLF-C02 questions linked to AWS shared responsibility model.
AWS IAM practice questions
Practise CLF-C02 questions linked to AWS IAM.
AWS pricing practice questions
Practise CLF-C02 questions linked to AWS pricing.
AWS support plans practice questions
Practise CLF-C02 questions linked to AWS support plans.
AWS S3 practice questions
Practise CLF-C02 questions linked to AWS S3.
AWS EC2 practice questions
Practise CLF-C02 questions linked to AWS EC2.
Practice this exam
Start a free CLF-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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 threat detection service that continuously monitors AWS API activity, including CloudTrail management events, VPC Flow Logs, and DNS logs, to identify suspicious patterns and known malicious IP addresses. It uses machine learning and integrated threat intelligence to detect anomalous behavior such as launching EC2 instances in unauthorized regions or modifying security groups for public SSH access, and can deliver near-real-time notifications via Amazon EventBridge or SNS. This makes it the correct choice for analyzing continuous streams of API activity and alerting on violations of a defined baseline.
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.
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 →
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.