- A
AWS CloudTrail
Why wrong: CloudTrail logs API calls, not configuration compliance.
- B
AWS Config
Config can evaluate bucket policies and trigger remediation.
- C
AWS Lambda
Why wrong: Lambda is possible but Config's auto-remediation is the recommended approach.
- D
AWS Systems Manager Automation
Automation runbooks can remediate the public access.
- E
Amazon GuardDuty
Why wrong: GuardDuty detects threats, not configuration issues.
Question 1,342 of 1,750
DOP-C02 AWS Config Managed Rules Practice Question
This DOP-C02 practice question tests your understanding of incident and event response. 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 Managed Rules. 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 DevOps team needs to implement a solution to automatically remediate an S3 bucket that becomes publicly accessible. Which TWO services should they use together?
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
✓
AWS Config
AWS Config can monitor S3 bucket configurations using a managed rule such as s3-bucket-public-read-prohibited. When a violation is detected, Config can automatically invoke an AWS Systems Manager Automation document as a remediation action. Systems Manager Automation runs a pre-defined workflow (e.g., applying a bucket policy that blocks public access) to correct the issue. This combination provides automated, event-driven remediation without manual intervention, making AWS Config and AWS Systems Manager Automation the correct pair.
Key principle: AWS Config Managed Rules
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 CloudTrail
Why it's wrong here
CloudTrail logs API calls, not configuration compliance.
- ✓
AWS Config
Why this is correct
Config can evaluate bucket policies and trigger remediation.
Related concept
AWS Config Managed Rules
- ✗
AWS Lambda
Why it's wrong here
Lambda is possible but Config's auto-remediation is the recommended approach.
- ✓
AWS Systems Manager Automation
Why this is correct
Automation runbooks can remediate the public access.
Related concept
AWS Config Managed Rules
- ✗
Amazon GuardDuty
Why it's wrong here
GuardDuty detects threats, not configuration issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that AWS Lambda is the primary service for custom remediation. However, AWS Config natively integrates with AWS Systems Manager Automation for automatic remediation of non-compliant resources, reducing the need for custom Lambda functions. Lambda is not listed as a correct answer in this scenario.
Detailed technical explanation
How to think about this question
AWS Config evaluates resource configurations against desired state rules and invokes Lambda via an Amazon SNS topic or directly through the AWS Config rule's remediation action. The Lambda function can use the AWS SDK to call PutPublicAccessBlock on the S3 bucket or apply a restrictive bucket policy. In a real-world scenario, you might combine this with AWS Config's conformance packs to enforce compliance across multiple accounts and regions, ensuring that any public access misconfiguration is reverted within seconds.
KKey Concepts to Remember
- AWS Config Managed Rules
- AWS Systems Manager Automation
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 Managed Rules
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 Managed Rules, then practise related DOP-C02 questions on the same topic to reinforce the concept.
- →
Incident and Event Response — study guide chapter
Learn the concepts, then practise the questions
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Incident and Event Response practice questions
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Incident and Event Response — This question tests Incident and Event Response — AWS Config Managed Rules.
What is the correct answer to this question?
The correct answer is: AWS Config — AWS Config can monitor S3 bucket configurations using a managed rule such as s3-bucket-public-read-prohibited. When a violation is detected, Config can automatically invoke an AWS Systems Manager Automation document as a remediation action. Systems Manager Automation runs a pre-defined workflow (e.g., applying a bucket policy that blocks public access) to correct the issue. This combination provides automated, event-driven remediation without manual intervention, making AWS Config and AWS Systems Manager Automation the correct pair.
What should I do if I get this DOP-C02 question wrong?
Review aWS Config Managed Rules, then practise related DOP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
AWS Config Managed Rules
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Last reviewed: Jun 30, 2026
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