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 an application to EC2 instances. 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.' The deployment group consists of 4 EC2 instances. The deployment configuration is 'CodeDeployDefault.OneAtATime'. The CodeDeploy agent logs on the failed instance show: 'Error: Script at specified location: scripts/install_dependencies.sh failed with exit code 1.' What should the developer do to resolve this issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review the install_dependencies.sh script for errors and correct them.
Option A is correct. The script failed with exit code 1, indicating a bug in the script. The developer should fix the script based on the logs. Option B is wrong because the deployment configuration is already OneAtATime; changing to AllAtOnce would make it worse. Option C is wrong because increasing instance count does not fix the script error. Option D is wrong because the error is in the script, not the agent.
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.
✗
Change the deployment configuration to 'CodeDeployDefault.AllAtOnce'.
Why it's wrong here
This would deploy to all instances simultaneously, but the script would still fail.
✓
Review the install_dependencies.sh script for errors and correct them.
Why this is correct
The script failed, causing the instance deployment to fail; fixing the script resolves the issue.
Related concept
Read the scenario before looking for a memorised answer.
✗
Reinstall the CodeDeploy agent on the failed instance.
Why it's wrong here
The agent is working; it executed the script and reported failure.
✗
Increase the number of EC2 instances in the deployment group.
Why it's wrong here
More instances would still fail if script is broken.
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.
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: Review the install_dependencies.sh script for errors and correct them. — Option A is correct. The script failed with exit code 1, indicating a bug in the script. The developer should fix the script based on the logs. Option B is wrong because the deployment configuration is already OneAtATime; changing to AllAtOnce would make it worse. Option C is wrong because increasing instance count does not fix the script error. Option D is wrong because the error is in the script, not the agent.
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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