DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 Lambda function processes messages from an SQS queue. The function occasionally fails due to network timeouts when calling an external API. The developer wants to retry failed messages automatically. What should the developer do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a dead-letter queue for the SQS queue and set the Lambda function's maximum retries to 2.
Option D is correct because configuring a dead-letter queue (DLQ) for the SQS queue allows messages that exceed the maximum retries to be stored for later analysis, while the Lambda function's retry behavior handles transient failures. Option A is wrong because increasing the Lambda timeout may help but does not provide automatic retries. Option B is wrong because SQS does not have a built-in retry mechanism; Lambda retries are separate. Option C is wrong because DLQ on Lambda captures only events that Lambda cannot process, but the best practice is to use SQS DLQ.
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.
✗
Enable SQS redrive policy to automatically retry after a failure.
Why it's wrong here
SQS does not have an automatic retry policy; Lambda handles retries.
✗
Configure a dead-letter queue on the Lambda function to capture failed events.
Why it's wrong here
Lambda DLQ is for asynchronous invocations; for SQS, it's better to use SQS DLQ.
✓
Configure a dead-letter queue for the SQS queue and set the Lambda function's maximum retries to 2.
Why this is correct
SQS DLQ stores messages that fail after retries, and Lambda retries can be configured.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the Lambda function's timeout to 15 minutes.
Why it's wrong here
Increasing timeout does not automatically retry failed messages.
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.
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: Configure a dead-letter queue for the SQS queue and set the Lambda function's maximum retries to 2. — Option D is correct because configuring a dead-letter queue (DLQ) for the SQS queue allows messages that exceed the maximum retries to be stored for later analysis, while the Lambda function's retry behavior handles transient failures. Option A is wrong because increasing the Lambda timeout may help but does not provide automatic retries. Option B is wrong because SQS does not have a built-in retry mechanism; Lambda retries are separate. Option C is wrong because DLQ on Lambda captures only events that Lambda cannot process, but the best practice is to use SQS DLQ.
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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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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