- A
Delete the stack and recreate it with the updated visibility timeout.
Why wrong: This would delete the queue and all messages, causing data loss.
- B
Update the stack directly; CloudFormation will automatically handle in-flight messages.
Why wrong: While CloudFormation can update the queue, it does not automatically manage in-flight messages. The update is safe if the new timeout is appropriate.
- C
Change the visibility timeout using the UpdateStack API; messages will be unaffected as long as the new timeout is longer than the current one.
The update modifies the queue's configuration without impacting existing messages. A longer timeout ensures messages don't become visible while being processed.
- D
Stop the queue, update the visibility timeout, then resume the queue.
Why wrong: You cannot stop an SQS queue; messages would be lost or delayed. This approach is not recommended.
DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. 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 wants to update an AWS CloudFormation stack that includes an Amazon SQS queue. The queue is currently processing messages. The developer needs to change the queue's default visibility timeout without losing any messages. Which approach should the developer take?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Change the visibility timeout using the UpdateStack API; messages will be unaffected as long as the new timeout is longer than the current one.
Option C is correct because the UpdateStack API allows you to modify the visibility timeout of an SQS queue without disrupting in-flight messages, as long as the new timeout is longer than the current one. This ensures that messages already being processed have sufficient time to complete before becoming visible again, preventing any message loss. CloudFormation handles the update by applying the change to the queue resource definition and triggering a stack update that modifies the queue's configuration without deleting or recreating it.
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.
- ✗
Delete the stack and recreate it with the updated visibility timeout.
Why it's wrong here
This would delete the queue and all messages, causing data loss.
- ✗
Update the stack directly; CloudFormation will automatically handle in-flight messages.
Why it's wrong here
While CloudFormation can update the queue, it does not automatically manage in-flight messages. The update is safe if the new timeout is appropriate.
- ✓
Change the visibility timeout using the UpdateStack API; messages will be unaffected as long as the new timeout is longer than the current one.
Why this is correct
The update modifies the queue's configuration without impacting existing messages. A longer timeout ensures messages don't become visible while being processed.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Stop the queue, update the visibility timeout, then resume the queue.
Why it's wrong here
You cannot stop an SQS queue; messages would be lost or delayed. This approach is not recommended.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think CloudFormation automatically handles in-flight messages during an update, but in reality, the developer must choose a new visibility timeout that is longer than the current one to prevent message loss.
Detailed technical explanation
How to think about this question
When you update an SQS queue's visibility timeout via CloudFormation, the service applies the change immediately to the queue's configuration, but in-flight messages retain their original timeout until it expires or the message is deleted. The new timeout only applies to messages received after the update, so setting a longer timeout ensures that existing in-flight messages are not prematurely made visible again, which could lead to duplicate processing. This behavior is consistent with the SQS API's UpdateQueueAttributes action, which modifies the queue's attributes without affecting messages already in flight.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
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: Change the visibility timeout using the UpdateStack API; messages will be unaffected as long as the new timeout is longer than the current one. — Option C is correct because the UpdateStack API allows you to modify the visibility timeout of an SQS queue without disrupting in-flight messages, as long as the new timeout is longer than the current one. This ensures that messages already being processed have sufficient time to complete before becoming visible again, preventing any message loss. CloudFormation handles the update by applying the change to the queue resource definition and triggering a stack update that modifies the queue's configuration without deleting or recreating it.
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
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Last reviewed: Jun 11, 2026
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.
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