- A
The S3 bucket policy does not allow CloudTrail to write logs.
Why wrong: This is not related to Lambda invocation.
- B
The Lambda function's IAM role does not have permission to modify CloudTrail.
Why wrong: The role has permissions to start and update, but the issue is invocation.
- C
The CloudTrail trail does not have permission to send logs to the S3 bucket.
Why wrong: This is not related to Lambda invocation.
- D
The AWS Config service does not have permission to invoke the Lambda function.
Config needs a resource-based policy on the Lambda function allowing it to invoke.
Question 369 of 1,748
SCS-C02 AWS Config Practice Question
This SCS-C02 practice question tests your understanding of management and security governance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: aWS Config. 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 multi-account AWS Organization with 50 accounts. The security team uses AWS CloudTrail to log all API calls and sends the logs to a central S3 bucket in the security account. The team wants to ensure that any attempt to disable CloudTrail logging or delete the trail is detected and automatically remediated within 5 minutes. They have configured an AWS Config rule that triggers an AWS Lambda function when the CloudTrail configuration changes. However, the Lambda function is not being invoked when they test by stopping the trail. The Lambda function's IAM role has permissions to start and update CloudTrail. CloudTrail logs show that the Config rule is evaluating the resource, but the Lambda function is not triggered. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The AWS Config service does not have permission to invoke the Lambda function.
The correct answer is D because AWS Config must have permission to invoke the Lambda function. Even though the Lambda function's IAM role has permissions to modify CloudTrail, the issue is that Config itself is not authorized to trigger the Lambda function. This is why the Lambda function is not invoked when the trail is stopped. Options A, B, and C are incorrect because they relate to different permission issues that are not the root cause.
Key principle: AWS Config
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The S3 bucket policy does not allow CloudTrail to write logs.
Why it's wrong here
This is not related to Lambda invocation.
- ✗
The Lambda function's IAM role does not have permission to modify CloudTrail.
Why it's wrong here
The role has permissions to start and update, but the issue is invocation.
- ✗
The CloudTrail trail does not have permission to send logs to the S3 bucket.
Why it's wrong here
This is not related to Lambda invocation.
- ✓
The AWS Config service does not have permission to invoke the Lambda function.
Why this is correct
Config needs a resource-based policy on the Lambda function allowing it to invoke.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
AWS Config
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- AWS Config
- Lambda Invocation Permissions
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
AWS Config
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.
Review aWS Config, then practise related SCS-C02 questions on the same topic to reinforce the concept.
- →
Management and Security Governance — study guide chapter
Learn the concepts, then practise the questions
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Management and Security Governance practice questions
Targeted practice on this topic area only
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Management and Security Governance — This question tests Management and Security Governance — AWS Config.
What is the correct answer to this question?
The correct answer is: The AWS Config service does not have permission to invoke the Lambda function. — The correct answer is D because AWS Config must have permission to invoke the Lambda function. Even though the Lambda function's IAM role has permissions to modify CloudTrail, the issue is that Config itself is not authorized to trigger the Lambda function. This is why the Lambda function is not invoked when the trail is stopped. Options A, B, and C are incorrect because they relate to different permission issues that are not the root cause.
What should I do if I get this SCS-C02 question wrong?
Review aWS Config, then practise related SCS-C02 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
AWS Config
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Last reviewed: Jun 20, 2026
This SCS-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 SCS-C02 exam.
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