The correct answer is to include a .ebextensions configuration file that runs a command to install the package. This is because Elastic Beanstalk processes .ebextensions YAML or JSON files during environment provisioning and updates, allowing you to execute custom commands, create files, or install packages via the packages key or commands key—ensuring the specific Python package is reliably installed on every EC2 instance in the environment. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of Elastic Beanstalk’s customization mechanisms, often appearing as a trap where candidates mistakenly rely on requirements.txt for all dependencies, forgetting that .ebextensions provides explicit control over non-standard packages. A common memory tip is to think of .ebextensions as the “custom installer” for anything outside the platform’s default software stack—if it’s not pre-installed, you script it there. Remember: requirements.txt handles Python dependencies, but .ebextensions handles everything else.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 is using AWS Elastic Beanstalk to deploy a Python web application. The application requires a specific version of a Python package that is not pre-installed on the Elastic Beanstalk platform. How should the developer ensure the package is installed on all environment instances?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Include a .ebextensions configuration file that runs a command to install the package.
Option B is correct because the .ebextensions configuration files allow you to run custom commands during environment creation and updates. Option A is wrong because the requirements.txt file is automatically processed only if the platform supports it, but for additional packages not in the default, .ebextensions is more reliable. Option C is wrong because the AWS CLI is not for modifying Elastic Beanstalk environment packages. Option D is wrong because the Dockerfile is only for Docker platforms, not the Python platform.
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.
✗
Use the AWS CLI to run a script on each instance after deployment.
Why it's wrong here
This is not automated and not a best practice.
✓
Include a .ebextensions configuration file that runs a command to install the package.
Why this is correct
.ebextensions files run custom configurations during provisioning.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add the package to a requirements.txt file and deploy it with the application source bundle.
Why it's wrong here
requirements.txt is used for pip, but Elastic Beanstalk may not automatically install from it if the platform does not support it.
✗
Create a custom Dockerfile and use the Docker platform in Elastic Beanstalk.
Why it's wrong here
The application is Python, not Docker; this is unnecessary.
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: Include a .ebextensions configuration file that runs a command to install the package. — Option B is correct because the .ebextensions configuration files allow you to run custom commands during environment creation and updates. Option A is wrong because the requirements.txt file is automatically processed only if the platform supports it, but for additional packages not in the default, .ebextensions is more reliable. Option C is wrong because the AWS CLI is not for modifying Elastic Beanstalk environment packages. Option D is wrong because the Dockerfile is only for Docker platforms, not the Python platform.
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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