- A
Enable S3 Transfer Acceleration on the S3 bucket and update CloudFront to use the accelerated endpoint.
Why wrong: S3 Transfer Acceleration is for faster uploads, not downloads, and does not address cache miss rates on CloudFront.
- B
Create separate CloudFront distributions for each geographic region and use Route 53 latency-based routing.
Why wrong: Creating separate distributions per region increases management overhead and cost, and does not leverage the existing distribution.
- C
Use Lambda@Edge to redirect requests to the nearest S3 bucket based on the viewer's location.
Lambda@Edge can redirect requests to the nearest regional S3 bucket based on viewer location, reducing latency and cache misses efficiently.
- D
Set up multiple origin groups in the existing CloudFront distribution with one S3 bucket per region, and configure cache behaviors based on geographic headers.
Why wrong: Origin groups are for failover, not geographic routing; this solution is not feasible as described.
SAP-C02 Lambda@Edge Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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. A key principle to apply: lambda@Edge. 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 media company delivers video content to a global audience using Amazon CloudFront, AWS Lambda@Edge, and Amazon S3. The origin is an S3 bucket that stores video files. Recently, users in Asia-Pacific report slow load times. The operations team checks CloudFront metrics and sees a high cache miss rate for content popular in that region. The team wants to improve performance for all users without significantly increasing costs. The application uses a single CloudFront distribution with a default cache behavior. The S3 bucket is in us-east-1. Which solution should the team implement?
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 Lambda@Edge to redirect requests to the nearest S3 bucket based on the viewer's location.
Option C is correct because using Lambda@Edge to redirect requests to the nearest S3 bucket based on viewer location reduces latency for global users by serving content from a regional S3 bucket. This approach improves performance for all users without significantly increasing costs, as it leverages existing Lambda@Edge and S3 infrastructure. Option D is incorrect because CloudFront origin groups are designed for failover, not geographic routing, and using geographic headers for origin selection is not a native feature.
Key principle: Lambda@Edge
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable S3 Transfer Acceleration on the S3 bucket and update CloudFront to use the accelerated endpoint.
Why it's wrong here
S3 Transfer Acceleration is for faster uploads, not downloads, and does not address cache miss rates on CloudFront.
- ✗
Create separate CloudFront distributions for each geographic region and use Route 53 latency-based routing.
Why it's wrong here
Creating separate distributions per region increases management overhead and cost, and does not leverage the existing distribution.
- ✓
Use Lambda@Edge to redirect requests to the nearest S3 bucket based on the viewer's location.
Why this is correct
Lambda@Edge can redirect requests to the nearest regional S3 bucket based on viewer location, reducing latency and cache misses efficiently.
Related concept
Lambda@Edge
- ✗
Set up multiple origin groups in the existing CloudFront distribution with one S3 bucket per region, and configure cache behaviors based on geographic headers.
Why it's wrong here
Origin groups are for failover, not geographic routing; this solution is not feasible as described.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that origin groups are often mistakenly thought to support geographic routing, but they only provide failover between origins. Right answer uses Lambda@Edge for location-based redirection.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Lambda@Edge
- CloudFront Origin Groups
- S3 Regional Buckets
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
Lambda@Edge
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 lambda@Edge, then practise related SAP-C02 questions on the same topic to reinforce the concept.
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Continuous Improvement for Existing Solutions — study guide chapter
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Continuous Improvement for Existing Solutions practice questions
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Lambda@Edge.
What is the correct answer to this question?
The correct answer is: Use Lambda@Edge to redirect requests to the nearest S3 bucket based on the viewer's location. — Option C is correct because using Lambda@Edge to redirect requests to the nearest S3 bucket based on viewer location reduces latency for global users by serving content from a regional S3 bucket. This approach improves performance for all users without significantly increasing costs, as it leverages existing Lambda@Edge and S3 infrastructure. Option D is incorrect because CloudFront origin groups are designed for failover, not geographic routing, and using geographic headers for origin selection is not a native feature.
What should I do if I get this SAP-C02 question wrong?
Review lambda@Edge, then practise related SAP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Lambda@Edge
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Last reviewed: Jun 20, 2026
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