DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. 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 designing a highly available application using Amazon SQS and AWS Lambda. Which TWO strategies should the developer implement to ensure that messages are processed at least once? (Choose TWO.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the SQS queue's visibility timeout to be greater than the Lambda function's timeout.
Options A and D are correct. Option A ensures at-least-once processing because after the visibility timeout, the message becomes visible again if not deleted. Option D ensures the function deletes the message only after successful processing. Option B is wrong because long polling reduces empty responses but doesn't guarantee processing. Option C is wrong because DLQ is for failed messages. Option E is wrong because FIFO ensures exactly-once, not at-least-once.
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 a Dead Letter Queue (DLQ) to capture failed messages.
Why it's wrong here
DLQ stores messages after max retries, not related to at-least-once.
✗
Enable long polling on the SQS queue.
Why it's wrong here
Long polling reduces empty responses but does not guarantee at-least-once processing.
✗
Use a FIFO queue to ensure exactly-once processing.
Why it's wrong here
FIFO provides exactly-once, not at-least-once.
✓
Set the SQS queue's visibility timeout to be greater than the Lambda function's timeout.
Why this is correct
If the function times out, the message becomes visible again, ensuring retry.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use the SQS DeleteMessage API inside the Lambda function only after successful processing.
Why this is correct
Deleting only after success ensures message is not lost before processing.
Clue confirmation
The clue word "least" in the question point toward this answer.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set the SQS queue's visibility timeout to be greater than the Lambda function's timeout. — Options A and D are correct. Option A ensures at-least-once processing because after the visibility timeout, the message becomes visible again if not deleted. Option D ensures the function deletes the message only after successful processing. Option B is wrong because long polling reduces empty responses but doesn't guarantee processing. Option C is wrong because DLQ is for failed messages. Option E is wrong because FIFO ensures exactly-once, not at-least-once.
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.
Are there clue words in this question I should notice?
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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
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