CLF-C02 Security and Compliance Practice Question
A company's security team needs to run automated vulnerability scans on all Amazon EC2 instances in their production environment. They require a managed service that checks for common vulnerabilities and exposures (CVEs) and identifies insecure network configurations. The scans must be scheduled to run weekly and the results must be viewable in the AWS Management Console. Which AWS service should the team use?
⚠ Common exam trap
Watch out — candidates often confuse Amazon Inspector (vulnerability scanning) with Amazon GuardDuty (threat detection) or AWS Shield (DDoS protection), as all three are security services but serve fundamentally different purposes—candidates often pick GuardDuty because it 'detects threats' without realizing it does not scan for CVEs or network configurations.
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 Inspector
Amazon Inspector is a managed vulnerability management service that automatically scans EC2 instances for software vulnerabilities (CVEs) and unintended network exposure. It supports scheduled recurring scans (e.g., weekly) and integrates with the AWS Management Console to display findings, making it the correct choice for the team's requirements.
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 Inspector
Why this is correct
Amazon Inspector is the correct service. It is a vulnerability management service that automatically scans EC2 instances for software vulnerabilities and network exposure, providing a managed solution for scheduling scans and viewing findings in the AWS Management Console.
- ✗
AWS Shield
Why it's wrong here
AWS Shield is a managed Distributed Denial of Service (DDoS) protection service that safeguards web applications using always-on network flow monitoring and automatic inline mitigations. It operates primarily at the network and transport layers (and at the application layer with Shield Advanced) to absorb volumetric attacks such as SYN floods and UDP reflection attacks. Shield does not inspect EC2 instance operating systems, installed software packages, open ports, or Common Vulnerabilities and Exposures (CVEs), so it cannot identify known security weaknesses. Its sole purpose is maintaining availability during traffic floods, not assessing the internal vulnerability posture of workloads.
When this WOULD be correct
A question asking for a managed service to protect against DDoS attacks, especially for high-value applications requiring advanced detection and mitigation, would make AWS Shield the correct answer.
- ✗
Amazon GuardDuty
Why it's wrong here
Amazon GuardDuty is a threat detection service that continuously monitors for malicious activity and unauthorized behavior by analyzing AWS CloudTrail logs, VPC Flow Logs, and DNS logs. It does not scan for known vulnerabilities or insecure configurations on EC2 instances.
When this WOULD be correct
A company needs a managed threat detection service that continuously monitors AWS accounts and workloads for malicious activity, such as unusual API calls or potentially compromised instances, and provides findings in the AWS Management Console.
- ✗
AWS WAF
Why it's wrong here
AWS WAF is a web application firewall that helps protect web applications from common web exploits like SQL injection and cross-site scripting. It does not perform vulnerability scanning on EC2 instances or check for CVEs.
When this WOULD be correct
A company needs to protect a web application running on EC2 instances from common web exploits like SQL injection or cross-site scripting, and requires a managed firewall that integrates with CloudFront, ALB, or API Gateway. The question would specify web application protection rather than vulnerability scanning.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Amazon InspectorCorrect answer▾
Why this is correct
Amazon Inspector is the correct service. It is a vulnerability management service that automatically scans EC2 instances for software vulnerabilities and network exposure, providing a managed solution for scheduling scans and viewing findings in the AWS Management Console.
✗AWS ShieldWrong answer — click to see why▾
Why this is wrong here
AWS Shield is a managed DDoS protection service, not a vulnerability scanner. It does not perform CVE checks or assess insecure network configurations on EC2 instances.
★ When this WOULD be the correct answer
A question asking for a managed service to protect against DDoS attacks, especially for high-value applications requiring advanced detection and mitigation, would make AWS Shield the correct answer.
Why candidates choose this
Candidates may confuse 'security scanning' with 'threat protection' and assume Shield covers all security assessments, or they may not differentiate between vulnerability scanning and DDoS mitigation.
✗Amazon GuardDutyWrong answer — click to see why▾
Why this is wrong here
Amazon GuardDuty is a threat detection service that monitors for malicious activity and unauthorized behavior, not a vulnerability scanning service that checks for CVEs and insecure configurations on EC2 instances.
★ When this WOULD be the correct answer
A company needs a managed threat detection service that continuously monitors AWS accounts and workloads for malicious activity, such as unusual API calls or potentially compromised instances, and provides findings in the AWS Management Console.
Why candidates choose this
Candidates may confuse GuardDuty's security monitoring and finding generation with vulnerability scanning, as both involve security assessments and produce findings in the console.
✗AWS WAFWrong answer — click to see why▾
Why this is wrong here
AWS WAF is a web application firewall that protects web applications from common exploits, not a vulnerability scanning service for EC2 instances. It does not perform automated scans for CVEs or insecure network configurations.
★ When this WOULD be the correct answer
A company needs to protect a web application running on EC2 instances from common web exploits like SQL injection or cross-site scripting, and requires a managed firewall that integrates with CloudFront, ALB, or API Gateway. The question would specify web application protection rather than vulnerability scanning.
Why candidates choose this
Candidates may confuse AWS WAF's security focus with vulnerability scanning, or think that because it inspects traffic it can identify vulnerabilities, but WAF only filters malicious requests, not scans for CVEs.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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About these practice questions
This CLF-C02 question is part of Courseiva's 988-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on CLF-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A security team wants to automatically scan their Amazon EC2 instances for known software vulnerabilities (CVEs) and assess whether any instances have unintended network access paths open. Which AWS service performs these automated security assessments?
medium- A.Amazon GuardDuty
- B.Amazon Macie
- ✓ C.Amazon Inspector
- D.AWS Shield
Why C: Amazon Inspector is the correct service because it is specifically designed to perform automated vulnerability scans (including CVEs) and network reachability assessments on EC2 instances. It uses a combination of AWS security best practices and common vulnerability databases to identify software vulnerabilities and unintended network access paths, such as open ports or overly permissive security groups.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.