DOP-C02 Incident and Event Response Practice Question
This DOP-C02 practice question tests your understanding of incident and event 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 company uses AWS Organizations with multiple accounts. The security team notices that an IAM user in the production account has been making changes to security group rules that are not compliant with the company's policy. The team wants to automatically revoke any non-compliant security group rules and notify the security team. What is the MOST efficient way to achieve this?
Create a CloudWatch alarm on the SecurityGroupEvent metric to notify the security team.
Why wrong: Alarms only notify, they do not revoke changes.
B
Apply a Service Control Policy (SCP) that denies changes to security groups in the production account.
Why wrong: SCPs cannot block specific rule modifications; they apply to the entire account.
C
Set up a CloudTrail trail that logs security group modifications and use Amazon Detective to analyze the changes.
Why wrong: This is detective, not corrective.
D
Use an AWS Config managed rule to detect non-compliant security group rules, and configure an automatic remediation action with AWS Systems Manager Automation.
This combination allows detection and automatic remediation.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an AWS Config managed rule to detect non-compliant security group rules, and configure an automatic remediation action with AWS Systems Manager Automation.
Option D is correct because AWS Config managed rules can continuously evaluate security group rules against a desired policy (e.g., disallowing SSH from 0.0.0.0/0). When a non-compliant change is detected, AWS Config can trigger an automatic remediation action using an AWS Systems Manager Automation document that revokes the offending rule. This provides both detection and automated correction without manual intervention, making it the most efficient solution.
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.
✗
Create a CloudWatch alarm on the SecurityGroupEvent metric to notify the security team.
Why it's wrong here
Alarms only notify, they do not revoke changes.
✗
Apply a Service Control Policy (SCP) that denies changes to security groups in the production account.
Why it's wrong here
SCPs cannot block specific rule modifications; they apply to the entire account.
✗
Set up a CloudTrail trail that logs security group modifications and use Amazon Detective to analyze the changes.
Why it's wrong here
This is detective, not corrective.
✓
Use an AWS Config managed rule to detect non-compliant security group rules, and configure an automatic remediation action with AWS Systems Manager Automation.
Why this is correct
This combination allows detection and automatic remediation.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse detective controls (CloudTrail, CloudWatch alarms) with corrective controls (AWS Config remediation), and fail to recognize that SCPs are preventive and cannot selectively revoke existing non-compliant rules.
Detailed technical explanation
How to think about this question
AWS Config managed rules, such as 'restricted-ssh' or 'ec2-security-group-attached-to-eni', evaluate resource configurations against defined policies. When a rule detects non-compliance, it can invoke an AWS Systems Manager Automation document (e.g., AWSConfigRemediation-RevokeUnusedSecurityGroupRules) that uses the EC2 RevokeSecurityGroupIngress API to remove the offending rule. This automation runs asynchronously, and the remediation action can be configured to trigger on each evaluation cycle, ensuring continuous compliance enforcement.
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.
Incident and Event Response — This question tests Incident and Event Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use an AWS Config managed rule to detect non-compliant security group rules, and configure an automatic remediation action with AWS Systems Manager Automation. — Option D is correct because AWS Config managed rules can continuously evaluate security group rules against a desired policy (e.g., disallowing SSH from 0.0.0.0/0). When a non-compliant change is detected, AWS Config can trigger an automatic remediation action using an AWS Systems Manager Automation document that revokes the offending rule. This provides both detection and automated correction without manual intervention, making it the most efficient solution.
What should I do if I get this DOP-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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