- A
AWS Config
Why wrong: AWS Config evaluates resource configurations against rules and can detect changes, but it does not specifically analyze resource-based policies to identify if they grant access to external principals. It is not the primary tool for this requirement.
- B
IAM Access Analyzer
IAM Access Analyzer continuously analyzes resource-based policies and generates findings when a resource is accessible from outside the AWS Organization. This matches the requirement of detecting unintended external access to S3 buckets and IAM roles.
- C
AWS Trusted Advisor
Why wrong: AWS Trusted Advisor provides recommendations across cost, performance, security, and fault tolerance, including some checks for security group rules and IAM use. However, it does not continuously monitor resource-level policies for external access and does not generate findings for unintended sharing.
- D
Amazon GuardDuty
Why wrong: Amazon GuardDuty is a threat detection service that monitors for malicious or unauthorized behavior, such as compromised instances or unusual API activity. It does not analyze resource-based policies for external access permissions.
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 has a strict security policy requiring that no Amazon S3 bucket or IAM role should be accessible to external AWS accounts unless explicitly approved. The security team needs a service that continuously analyzes resource-based policies and can generate findings when an S3 bucket policy allows access to a principal from outside the company's AWS Organization. Which AWS service should the 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
IAM Access Analyzer
IAM Access Analyzer is designed to continuously analyze resource-based policies (such as S3 bucket policies and IAM role trust policies) and generate findings when access is granted to principals outside of the trusted AWS Organization. It uses zone of trust logic to identify policies that allow access to external AWS accounts, making it the correct service for this security requirement.
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 evaluates resource configurations against rules and can detect changes, but it does not specifically analyze resource-based policies to identify if they grant access to external principals. It is not the primary tool for this requirement.
When this WOULD be correct
A company needs to automatically remediate S3 buckets that are publicly accessible. AWS Config with a managed rule like 's3-bucket-public-read-prohibited' can detect noncompliant buckets and trigger remediation actions.
- ✓
IAM Access Analyzer
Why this is correct
IAM Access Analyzer continuously analyzes resource-based policies and generates findings when a resource is accessible from outside the AWS Organization. This matches the requirement of detecting unintended external access to S3 buckets and IAM roles.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Trusted Advisor
Why it's wrong here
AWS Trusted Advisor provides recommendations across cost, performance, security, and fault tolerance, including some checks for security group rules and IAM use. However, it does not continuously monitor resource-level policies for external access and does not generate findings for unintended sharing.
- ✗
Amazon GuardDuty
Why it's wrong here
Amazon GuardDuty is a threat detection service that monitors for malicious or unauthorized behavior, such as compromised instances or unusual API activity. It does not analyze resource-based policies for external access permissions.
When this WOULD be correct
An exam scenario where GuardDuty would be correct: A company needs to detect suspicious API calls or potential compromise of AWS credentials within their account, such as unusual S3 bucket access patterns or unauthorized IAM role usage from external IPs.
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.
✓IAM Access AnalyzerCorrect answer▾
Why this is correct
IAM Access Analyzer continuously analyzes resource-based policies and generates findings when a resource is accessible from outside the AWS Organization. This matches the requirement of detecting unintended external access to S3 buckets and IAM roles.
✗AWS ConfigWrong answer — click to see why▾
Why this is wrong here
AWS Config evaluates resource compliance against rules but does not analyze resource-based policies for cross-account access. It cannot detect S3 bucket policies granting access to principals outside the AWS Organization.
★ When this WOULD be the correct answer
A company needs to automatically remediate S3 buckets that are publicly accessible. AWS Config with a managed rule like 's3-bucket-public-read-prohibited' can detect noncompliant buckets and trigger remediation actions.
Why candidates choose this
Candidates may confuse AWS Config's compliance monitoring with IAM Access Analyzer's policy analysis, assuming Config can also check for cross-account access in resource policies.
✗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 for analyzing resource-based policies for cross-account access. It does not generate findings based on S3 bucket policies allowing external principals.
★ When this WOULD be the correct answer
An exam scenario where GuardDuty would be correct: A company needs to detect suspicious API calls or potential compromise of AWS credentials within their account, such as unusual S3 bucket access patterns or unauthorized IAM role usage from external IPs.
Why candidates choose this
Candidates may confuse GuardDuty's security monitoring capabilities with policy analysis, assuming it can detect any security misconfiguration including overly permissive S3 bucket policies.
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?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Config (which audits resource configurations) with IAM Access Analyzer (which specifically analyzes resource-based policies for cross-account access), leading them to choose AWS Config for a use case that requires policy-level access analysis.
Detailed technical explanation
How to think about this question
IAM Access Analyzer uses a 'zone of trust' defined by the AWS Organization or account to automatically identify policies that grant access to external principals. It supports custom policy checks and can validate policies against security standards before deployment, using the IAM policy grammar and the AWS Policy Authorization Language. In a real-world scenario, if an S3 bucket policy inadvertently includes a Principal like 'AWS: 123456789012' from another organization, IAM Access Analyzer will flag it as a finding, enabling remediation before a data leak occurs.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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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: IAM Access Analyzer — IAM Access Analyzer is designed to continuously analyze resource-based policies (such as S3 bucket policies and IAM role trust policies) and generate findings when access is granted to principals outside of the trusted AWS Organization. It uses zone of trust logic to identify policies that allow access to external AWS accounts, making it the correct service for this security requirement.
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 →
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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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