- A
Add a custom action in the pipeline that invokes a third-party scanning service via AWS Lambda.
Custom actions allow integration with external tools.
- B
Enable AWS Shield Advanced to scan for vulnerabilities.
Why wrong: Shield is for DDoS protection, not code scanning.
- C
Use Amazon Inspector to scan the source code.
Why wrong: Inspector scans EC2 instances, not code.
- D
Add an S3 event notification to trigger a Lambda function that scans the S3 bucket.
Why wrong: Scans should run before deployment, not after.
- E
Modify the buildspec in the build stage to include commands that run security scanning tools.
CodeBuild can run custom commands including security tools.
Question 1,524 of 1,750
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
An organization uses AWS CodePipeline to deploy a static website to Amazon S3. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild that minifies assets), and a deploy stage (S3 deployment). The team wants to add a stage for running security vulnerability scans on the code. Which TWO options are viable?
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
✓
Add a custom action in the pipeline that invokes a third-party scanning service via AWS Lambda.
Option A is correct because AWS CodePipeline supports custom actions that can invoke external services via AWS Lambda. By creating a custom action, the team can integrate a third-party security scanning service directly into the pipeline, allowing the scan to run as a distinct stage between build and deploy. This approach ensures that the pipeline fails if vulnerabilities are detected, preventing insecure code from reaching the S3 bucket.
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.
- ✓
Add a custom action in the pipeline that invokes a third-party scanning service via AWS Lambda.
Why this is correct
Custom actions allow integration with external tools.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable AWS Shield Advanced to scan for vulnerabilities.
Why it's wrong here
Shield is for DDoS protection, not code scanning.
- ✗
Use Amazon Inspector to scan the source code.
Why it's wrong here
Inspector scans EC2 instances, not code.
- ✗
Add an S3 event notification to trigger a Lambda function that scans the S3 bucket.
Why it's wrong here
Scans should run before deployment, not after.
- ✓
Modify the buildspec in the build stage to include commands that run security scanning tools.
Why this is correct
CodeBuild can run custom commands including security tools.
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 may confuse Amazon Inspector (which scans runtime environments) with a source code scanner, or assume that Shield Advanced provides vulnerability scanning, when in fact it only mitigates DDoS attacks.
Detailed technical explanation
How to think about this question
Custom actions in CodePipeline use the Job Worker pattern: a Lambda function (or other compute) polls for pipeline jobs via the AWS SDK, performs the scan, and reports success or failure back to the pipeline using PutJobSuccessResult or PutJobFailureResult. This allows integration with any external tool, such as Snyk or SonarQube, without requiring a dedicated CodeBuild project. The buildspec modification (Option E) is also viable because it runs scanning commands as part of the existing build stage, but this can increase build time and mix concerns; a separate custom action provides clearer stage isolation and failure handling.
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 DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a custom action in the pipeline that invokes a third-party scanning service via AWS Lambda. — Option A is correct because AWS CodePipeline supports custom actions that can invoke external services via AWS Lambda. By creating a custom action, the team can integrate a third-party security scanning service directly into the pipeline, allowing the scan to run as a distinct stage between build and deploy. This approach ensures that the pipeline fails if vulnerabilities are detected, preventing insecure code from reaching the S3 bucket.
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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Last reviewed: Jul 4, 2026
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