DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 running a serverless application using AWS Lambda and Amazon API Gateway. The application experiences increased latency during peak hours. CloudWatch metrics show that Lambda function duration remains stable, but API Gateway latency spikes. Which THREE actions should the developer take to reduce API Gateway latency?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable compression for API responses.
Options A, B, and D are correct. Enabling caching reduces backend calls, using Regional endpoint reduces network latency, and enabling compression reduces payload size. Option C is wrong because throttling limits do not reduce latency. Option E is wrong because increasing Lambda timeout does not affect API Gateway latency.
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 Lambda function timeout.
Why it's wrong here
Lambda timeout does not affect API Gateway latency.
✓
Enable compression for API responses.
Why this is correct
Compression reduces response size, speeding up transfer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the API Gateway throttling limits.
Why it's wrong here
Throttling limits control request rate, not latency.
✓
Enable API Gateway caching for the endpoints.
Why this is correct
Caching reduces calls to Lambda, lowering latency.
Related concept
Read the scenario before looking for a memorised answer.
✓
Switch API Gateway endpoint type from Edge-optimized to Regional.
Why this is correct
Regional endpoints avoid CloudFront latency.
Related concept
Read the scenario before looking for a memorised answer.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: Enable compression for API responses. — Options A, B, and D are correct. Enabling caching reduces backend calls, using Regional endpoint reduces network latency, and enabling compression reduces payload size. Option C is wrong because throttling limits do not reduce latency. Option E is wrong because increasing Lambda timeout does not affect API Gateway latency.
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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