The correct answer is the CloudWatch metric TotalRequestLatency for the S3 bucket. This metric measures the complete round-trip time for an S3 request, from the moment the client sends the data to the S3 endpoint until the final response is received, making it the ideal gauge for assessing the end-to-end performance improvement offered by S3 Transfer Acceleration. When Transfer Acceleration is working as intended, routing traffic through AWS edge locations and the optimized global network reduces this latency compared to a standard upload, so a lower TotalRequestLatency value confirms the feature is beneficial. On the AWS Certified Developer Associate DVA-C02 exam, this tests your understanding that Transfer Acceleration is not always faster—it depends on network conditions and geographic distance, and a common trap is to check metrics like BytesDownloaded or SuccessRate instead. Remember the memory tip: “TotalRequestLatency tells you the total time saved—if it’s lower, acceleration is your friend.”
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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 developer is using Amazon S3 Transfer Acceleration to upload a large file. The upload is slower than expected. Which metric should the developer check to determine if Transfer Acceleration is providing a benefit?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CloudWatch metric 'TotalRequestLatency' for the S3 bucket.
TotalRequestLatency measures the time taken for a complete S3 request, including the time to send the request to the S3 endpoint and receive the response. For S3 Transfer Acceleration, this metric reflects the end-to-end latency improvement achieved by routing traffic through AWS edge locations and the optimized network path. A lower TotalRequestLatency compared to a non-accelerated upload indicates that Transfer Acceleration is providing a benefit.
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.
CloudWatch metric 'TotalRequestLatency' for the S3 bucket.
Why this is correct
This metric shows the time for a complete upload, indicating acceleration benefit.
Related concept
Read the scenario before looking for a memorised answer.
✗
CloudWatch metric 'FirstByteLatency' for the S3 bucket.
Why it's wrong here
This is for first byte, not total upload time.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing 'FirstByteLatency' (which measures initial response time for reads) with 'TotalRequestLatency' (which captures the full upload duration), leading candidates to incorrectly select D when they should focus on the end-to-end time for uploads.
Detailed technical explanation
How to think about this question
S3 Transfer Acceleration uses AWS edge locations and the global AWS backbone network to accelerate uploads, reducing latency and packet loss compared to direct internet routing. The TotalRequestLatency metric includes the time for TCP handshake, SSL negotiation, and data transfer, making it the best indicator of acceleration benefit. In practice, if TotalRequestLatency is lower when using the accelerated endpoint (e.g., `bucketname.s3-accelerate.amazonaws.com`) versus the standard endpoint, the feature is effective.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: CloudWatch metric 'TotalRequestLatency' for the S3 bucket. — TotalRequestLatency measures the time taken for a complete S3 request, including the time to send the request to the S3 endpoint and receive the response. For S3 Transfer Acceleration, this metric reflects the end-to-end latency improvement achieved by routing traffic through AWS edge locations and the optimized network path. A lower TotalRequestLatency compared to a non-accelerated upload indicates that Transfer Acceleration is providing a benefit.
What should I do if I get this DVA-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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.