- A
The CodeDeploy agent is not sending logs to CloudWatch.
Why wrong: Missing logs would not cause deployment failure.
- B
The deployment configuration has a minimum healthy instances setting that is too restrictive.
The error indicates too few healthy instances.
- C
The application's lifecycle hooks are failing during the ApplicationStop event.
Why wrong: Lifecycle hooks failure would cause a different error.
- D
The instances were launched from an AMI that does not have the CodeDeploy agent installed.
Why wrong: The error is about healthy instances, not agent installation.
Question 581 of 1,616
CodePipeline Deployment Failure: Minimum Healthy Hosts
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 developer is using AWS CodePipeline to deploy a web application to an Auto Scaling group. The pipeline includes a deploy action that uses CodeDeploy. The deployment fails with the error: 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available, or some instances in your deployment group are experiencing problems.' Which of the following is the MOST likely cause?
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.
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 deployment configuration has a minimum healthy instances setting that is too restrictive.
The error message indicates that the deployment failed because too many instances were unhealthy or failed. The most likely cause is that the deployment configuration's minimum healthy hosts setting is too restrictive, meaning it requires a higher percentage of healthy instances during deployment than the environment can sustain, causing CodeDeploy to stop the deployment when the threshold is breached.
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 CodeDeploy agent is not sending logs to CloudWatch.
Why it's wrong here
Missing logs would not cause deployment failure.
- ✓
The deployment configuration has a minimum healthy instances setting that is too restrictive.
Why this is correct
The error indicates too few healthy instances.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The application's lifecycle hooks are failing during the ApplicationStop event.
Why it's wrong here
Lifecycle hooks failure would cause a different error.
- ✗
The instances were launched from an AMI that does not have the CodeDeploy agent installed.
Why it's wrong here
The error is about healthy instances, not agent installation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse individual instance failures (e.g., missing agent, hook errors) with the deployment group-level threshold error, leading them to pick options that explain why a single instance failed rather than why the entire deployment was aborted.
Detailed technical explanation
How to think about this question
CodeDeploy's deployment configuration includes a 'minimum healthy hosts' setting (e.g., 75% or 1 instance) that defines the threshold of healthy instances required for the deployment to continue. During a rolling update, if the number of healthy instances drops below this threshold (e.g., due to failed deployments on some instances), CodeDeploy aborts the entire deployment to prevent further impact. This is distinct from individual instance failures, which would show a different error message like 'Instance deployment failed'.
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: The deployment configuration has a minimum healthy instances setting that is too restrictive. — The error message indicates that the deployment failed because too many instances were unhealthy or failed. The most likely cause is that the deployment configuration's minimum healthy hosts setting is too restrictive, meaning it requires a higher percentage of healthy instances during deployment than the environment can sustain, causing CodeDeploy to stop the deployment when the threshold is breached.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". 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.
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Last reviewed: Jul 4, 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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