- A
Check the deployment group configuration.
Why wrong: Configuration is not the issue.
- B
Verify the build output from CodeBuild.
Why wrong: Build output is likely fine.
- C
Check the appspec.yml file for errors in the BeforeInstall hook.
Lifecycle hooks are defined in appspec.yml.
- D
Review the deployment configuration settings.
Why wrong: Not related to lifecycle hooks.
Question 880 of 1,616
CodeDeploy BeforeInstall Failure: Check appspec.yml Hook Scripts
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. A key principle to apply: appspec.yml. 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 during the BeforeInstall lifecycle event. What should the developer do to troubleshoot the issue?
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
✓
Check the appspec.yml file for errors in the BeforeInstall hook.
Option C is correct because the BeforeInstall hook scripts are defined in the appspec.yml file, and a failure during that lifecycle event typically indicates an error in the script or the hook configuration. Option A is wrong because the deployment group configuration (e.g., Auto Scaling group, tags) does not directly cause a script failure in the BeforeInstall hook. Option B is wrong because the build output from CodeBuild is already successful and not related to the deployment failure. Option D is wrong because deployment configuration settings (e.g., deployment type, rollback triggers) do not affect the execution of the BeforeInstall hook scripts.
Key principle: appspec.yml
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Check the deployment group configuration.
Why it's wrong here
Configuration is not the issue.
- ✗
Verify the build output from CodeBuild.
Why it's wrong here
Build output is likely fine.
- ✓
Check the appspec.yml file for errors in the BeforeInstall hook.
Why this is correct
Lifecycle hooks are defined in appspec.yml.
Related concept
appspec.yml
- ✗
Review the deployment configuration settings.
Why it's wrong here
Not related to lifecycle hooks.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is to overlook the appspec.yml file and instead check deployment group or configuration settings when the issue is clearly with the script specified in the appspec hooks.
Trap categories for this question
Command / output trap
Build output is likely fine.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- appspec.yml
- Lifecycle events
- BeforeInstall hook
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
appspec.yml
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. appspec.yml 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.
Review appspec.yml, then practise related DVA-C02 questions on the same topic to reinforce the concept.
- →
Deployment — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Deployment — This question tests Deployment — appspec.yml.
What is the correct answer to this question?
The correct answer is: Check the appspec.yml file for errors in the BeforeInstall hook. — Option C is correct because the BeforeInstall hook scripts are defined in the appspec.yml file, and a failure during that lifecycle event typically indicates an error in the script or the hook configuration. Option A is wrong because the deployment group configuration (e.g., Auto Scaling group, tags) does not directly cause a script failure in the BeforeInstall hook. Option B is wrong because the build output from CodeBuild is already successful and not related to the deployment failure. Option D is wrong because deployment configuration settings (e.g., deployment type, rollback triggers) do not affect the execution of the BeforeInstall hook scripts.
What should I do if I get this DVA-C02 question wrong?
Review appspec.yml, then practise related DVA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
appspec.yml
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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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