- A
Configure CodePipeline to directly invalidate CloudFront using a built-in action.
Why wrong: CodePipeline does not have a built-in CloudFront invalidation action.
- B
Create a CodePipeline stage with a deploy action to CloudFront.
Why wrong: There is no deploy action for CloudFront.
- C
Use CloudFront to automatically invalidate based on S3 events.
Why wrong: CloudFront does not automatically invalidate on S3 events.
- D
Use the AWS CLI command 'aws cloudfront create-invalidation' in a CodeBuild build step.
This can be run as a build action.
- E
Add a Lambda function as a custom action in CodePipeline that calls the CloudFront invalidation API.
Custom actions can invoke Lambda.
Question 439 of 1,750
How to Invalidate CloudFront Cache After Deployment in CodePipeline
This DOP-C02 practice question tests your understanding of sdlc automation. 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 CodePipeline to deploy a static website to Amazon S3 and CloudFront. The pipeline currently uses CodeBuild to run tests and then deploys to an S3 bucket. The team wants to add a stage that invalidates the CloudFront cache after deployment. Which TWO actions achieve this?
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
✓
Use the AWS CLI command 'aws cloudfront create-invalidation' in a CodeBuild build step.
Option D is correct because you can use the AWS CLI command 'aws cloudfront create-invalidation' in a CodeBuild build step to programmatically invalidate the CloudFront cache after deployment. This approach integrates seamlessly into the existing pipeline by adding a build action that runs the CLI command, ensuring the cache is cleared for updated objects in 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.
- ✗
Configure CodePipeline to directly invalidate CloudFront using a built-in action.
Why it's wrong here
CodePipeline does not have a built-in CloudFront invalidation action.
- ✗
Create a CodePipeline stage with a deploy action to CloudFront.
Why it's wrong here
There is no deploy action for CloudFront.
- ✗
Use CloudFront to automatically invalidate based on S3 events.
Why it's wrong here
CloudFront does not automatically invalidate on S3 events.
- ✓
Use the AWS CLI command 'aws cloudfront create-invalidation' in a CodeBuild build step.
Why this is correct
This can be run as a build action.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Add a Lambda function as a custom action in CodePipeline that calls the CloudFront invalidation API.
Why this is correct
Custom actions can invoke Lambda.
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 assume CodePipeline has a built-in CloudFront invalidation action or that CloudFront automatically invalidates cache based on S3 events, but neither is true; you must explicitly trigger invalidation via the CLI, SDK, or a custom action.
Detailed technical explanation
How to think about this question
Under the hood, the 'aws cloudfront create-invalidation' command sends a POST request to the CloudFront API endpoint, specifying the distribution ID and paths to invalidate. In a real-world scenario, you might need to invalidate only specific paths (e.g., '/index.html') rather than the entire distribution to reduce costs and improve performance, as invalidation requests are billed per path. Additionally, you can use a Lambda function as a custom action in CodePipeline to call the CloudFront invalidation API, which provides more flexibility for complex logic or error 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: Use the AWS CLI command 'aws cloudfront create-invalidation' in a CodeBuild build step. — Option D is correct because you can use the AWS CLI command 'aws cloudfront create-invalidation' in a CodeBuild build step to programmatically invalidate the CloudFront cache after deployment. This approach integrates seamlessly into the existing pipeline by adding a build action that runs the CLI command, ensuring the cache is cleared for updated objects in 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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