DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 debugging an application that uses Amazon SQS. The application occasionally processes the same message twice. Which TWO configurations can help prevent duplicate processing?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the visibility timeout to ensure messages are deleted before becoming visible again.
Option A is correct: enabling content-based deduplication for FIFO queues ensures exactly-once processing. Option B is correct: increasing the visibility timeout gives the consumer more time to process and delete the message before it becomes visible again. Option C is wrong: increasing the delivery delay only delays the first delivery. Option D is wrong: enabling long polling improves efficiency but does not prevent duplicates. Option E is wrong: using a dead-letter queue handles failed messages, not duplicates.
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 visibility timeout to ensure messages are deleted before becoming visible again.
Why this is correct
A longer visibility timeout reduces the chance of re-processing.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure a dead-letter queue to capture duplicates.
Why it's wrong here
DLQ captures messages that failed processing, not duplicates.
✗
Increase the delivery delay to defer message processing.
Why it's wrong here
Delivery delay only delays the first delivery.
✗
Enable long polling to reduce empty responses.
Why it's wrong here
Long polling does not prevent duplicates.
✓
Use a FIFO queue with content-based deduplication.
Why this is correct
FIFO queues support exactly-once processing.
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.
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 visibility timeout to ensure messages are deleted before becoming visible again. — Option A is correct: enabling content-based deduplication for FIFO queues ensures exactly-once processing. Option B is correct: increasing the visibility timeout gives the consumer more time to process and delete the message before it becomes visible again. Option C is wrong: increasing the delivery delay only delays the first delivery. Option D is wrong: enabling long polling improves efficiency but does not prevent duplicates. Option E is wrong: using a dead-letter queue handles failed messages, not duplicates.
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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