SCS-C02 Threat Detection and Incident Response Practice Question
This SCS-C02 practice question tests your understanding of threat detection and incident response. 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 security engineer is implementing automated incident response. The engineer wants to use AWS Lambda to automatically remediate GuardDuty findings. What is the recommended pattern to trigger the Lambda function?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an Amazon EventBridge rule to match GuardDuty findings and invoke the Lambda function.
Amazon EventBridge is the recommended pattern because it natively integrates with AWS GuardDuty to receive all finding events in near real-time. By configuring an EventBridge rule that matches GuardDuty finding types (e.g., 'UnauthorizedAccess:EC2/SSHBruteForce'), you can directly invoke a Lambda function for automated remediation without polling or intermediate services. This pattern is serverless, event-driven, and follows AWS best practices for decoupled incident response.
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.
✓
Configure an Amazon EventBridge rule to match GuardDuty findings and invoke the Lambda function.
Why this is correct
EventBridge is the recommended way to route GuardDuty findings to Lambda for automated remediation.
Related concept
Read the scenario before looking for a memorised answer.
✗
Subscribe the Lambda function to an SNS topic that GuardDuty publishes findings to.
Why it's wrong here
While possible, EventBridge is the native integration; SNS adds unnecessary complexity.
✗
Use CloudWatch Logs subscription filter to trigger Lambda on GuardDuty log entries.
Why it's wrong here
GuardDuty does not write findings to CloudWatch Logs directly; it uses EventBridge.
✗
Have the Lambda function poll the EC2 instance metadata for threat indicators.
Why it's wrong here
EC2 instance metadata does not contain GuardDuty findings.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume GuardDuty uses SNS or CloudWatch Logs for output, similar to other AWS services, but GuardDuty exclusively emits findings as EventBridge events, making EventBridge the only native and recommended trigger pattern for Lambda remediation.
Detailed technical explanation
How to think about this question
Under the hood, GuardDuty generates findings as structured JSON events that are automatically published to the default EventBridge event bus. EventBridge rules can filter on the 'source' field set to 'aws.guardduty' and the 'detail-type' set to 'GuardDuty Finding', allowing precise triggering of Lambda functions. In a real-world scenario, this enables automated actions like isolating an EC2 instance by modifying security groups or triggering a Step Functions workflow for forensic analysis, all within seconds of the finding being generated.
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.
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure an Amazon EventBridge rule to match GuardDuty findings and invoke the Lambda function. — Amazon EventBridge is the recommended pattern because it natively integrates with AWS GuardDuty to receive all finding events in near real-time. By configuring an EventBridge rule that matches GuardDuty finding types (e.g., 'UnauthorizedAccess:EC2/SSHBruteForce'), you can directly invoke a Lambda function for automated remediation without polling or intermediate services. This pattern is serverless, event-driven, and follows AWS best practices for decoupled incident response.
What should I do if I get this SCS-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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Question Discussion
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