- A
The deployment group's maximum instances is set to 4, which exceeds the number of instances in the Auto Scaling group.
Why wrong: Incorrect because the maximum is not exceeded; it is a limit, not a current count.
- B
The Auto Scaling group has only 2 instances, and one instance fails during deployment, leaving less than the required healthy instances.
Correct because the deployment configuration requires one instance at a time, and with only 2 instances, a failure reduces healthy count below threshold.
- C
The IAM role attached to the instances does not have sufficient permissions to download the revision from Amazon S3.
Why wrong: Incorrect because the error message does not indicate permission issues.
- D
The revision is not properly zipped or the AppSpec file is missing.
Why wrong: Incorrect because the error message points to instance health, not revision format.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails with the error 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available for deployment, or some instances in your deployment group are experiencing problems.' The deployment group has a minimum of 2 instances and a maximum of 4. The deployment configuration is CodeDeployDefault.OneAtATime. What is the most likely cause of the failure?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
The Auto Scaling group has only 2 instances, and one instance fails during deployment, leaving less than the required healthy instances.
Option A is correct because the deployment configuration specifies one instance at a time, but the Auto Scaling group may have only 2 instances, which is the minimum. If one instance fails, the healthy count drops below the required threshold, causing the deployment to fail. Option B is wrong because the IAM role typically does not cause such errors. Option C is wrong because the deployment group size is not the issue. Option D is wrong because the revision is uploaded, not the cause.
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.
- ✗
The deployment group's maximum instances is set to 4, which exceeds the number of instances in the Auto Scaling group.
Why it's wrong here
Incorrect because the maximum is not exceeded; it is a limit, not a current count.
- ✓
The Auto Scaling group has only 2 instances, and one instance fails during deployment, leaving less than the required healthy instances.
Why this is correct
Correct because the deployment configuration requires one instance at a time, and with only 2 instances, a failure reduces healthy count below threshold.
Clue confirmation
The clue words "most likely", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The IAM role attached to the instances does not have sufficient permissions to download the revision from Amazon S3.
Why it's wrong here
Incorrect because the error message does not indicate permission issues.
- ✗
The revision is not properly zipped or the AppSpec file is missing.
Why it's wrong here
Incorrect because the error message points to instance health, not revision format.
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 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 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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Auto Scaling group has only 2 instances, and one instance fails during deployment, leaving less than the required healthy instances. — Option A is correct because the deployment configuration specifies one instance at a time, but the Auto Scaling group may have only 2 instances, which is the minimum. If one instance fails, the healthy count drops below the required threshold, causing the deployment to fail. Option B is wrong because the IAM role typically does not cause such errors. Option C is wrong because the deployment group size is not the issue. Option D is wrong because the revision is uploaded, not the cause.
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: "most likely", "minimum / minimize". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 20, 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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