The answer is to configure multiple origins with origin failover, enable Origin Shield, and optimize cache behavior settings. These three actions directly address high latency for CloudFront with an S3 origin by reducing the distance requests travel and offloading the origin. Origin Shield acts as an additional caching layer that consolidates requests from edge locations, minimizing the load on the S3 bucket and improving response times for users in distant regions. On the AWS Certified Developer Associate DVA-C02 exam, this question tests your understanding of CloudFront’s performance features beyond basic edge locations—a common trap is thinking that adding more origins increases edge presence, but CloudFront already has a global network; the real optimization comes from shielding and failover. Remember the mnemonic “SOF” for Shield, Origins, and Failover to recall the three latency-reducing tactics.
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is using CloudFront with an S3 origin to serve static content. Users in some geographic regions experience high latency. The developer wants to optimize performance. Which THREE actions should the developer take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the TTL for the cache behavior to reduce requests to the origin.
Option A is correct: adding more edge locations (through additional origins) is not possible directly, but optimizing the origin is. Actually, CloudFront has many edge locations, but adding more origins doesn't help. Option B is correct: enabling origin shield reduces load on the origin. Option C is correct: using multiple origins and failover can improve availability. Option D is wrong: S3 Transfer Acceleration is for uploading to S3, not for CloudFront. Option E is wrong: TTL does not affect latency, only cache hit ratio.
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.
✓
Increase the TTL for the cache behavior to reduce requests to the origin.
Why this is correct
Higher TTL improves cache hit ratio, reducing origin requests and latency.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 Transfer Acceleration for the origin bucket.
Why it's wrong here
Transfer Acceleration is for uploading to S3, not for CloudFront origins.
✓
Enable CloudFront Origin Shield to reduce the number of requests to the origin.
Why this is correct
Origin Shield improves cache hit ratio and reduces origin load.
Related concept
Read the scenario before looking for a memorised answer.
✓
Configure multiple origins and set up origin failover.
Why this is correct
Origin failover improves availability and can reduce latency if a regional origin is used.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add additional CloudFront edge locations in the affected regions.
Why it's wrong here
CloudFront automatically has edge locations; you cannot manually add them.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Increase the TTL for the cache behavior to reduce requests to the origin. — Option A is correct: adding more edge locations (through additional origins) is not possible directly, but optimizing the origin is. Actually, CloudFront has many edge locations, but adding more origins doesn't help. Option B is correct: enabling origin shield reduces load on the origin. Option C is correct: using multiple origins and failover can improve availability. Option D is wrong: S3 Transfer Acceleration is for uploading to S3, not for CloudFront. Option E is wrong: TTL does not affect latency, only cache hit ratio.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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