- A
Use the AWS CLI to run a script on each instance after deployment.
Why wrong: This is not automated and not a best practice.
- B
Include a .ebextensions configuration file that runs a command to install the package.
.ebextensions files run custom configurations during provisioning.
- C
Add the package to a requirements.txt file and deploy it with the application source bundle.
Why wrong: requirements.txt is used for pip, but Elastic Beanstalk may not automatically install from it if the platform does not support it.
- D
Create a custom Dockerfile and use the Docker platform in Elastic Beanstalk.
Why wrong: The application is Python, not Docker; this is unnecessary.
Question 1,266 of 1,616
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 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
✓
Include a .ebextensions configuration file that runs a command to install the package.
Option B is correct because `.ebextensions` configuration files allow you to run custom commands during environment provisioning. By placing a `.config` file in the `.ebextensions` directory of your source bundle, you can use the `commands` key to execute a shell command (e.g., `pip install <package>`) on each EC2 instance before the application starts. This ensures the required Python package is installed on all environment instances as part of the deployment lifecycle.
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
The trap here is that candidates often assume that adding a package to `requirements.txt` is sufficient for all Python packages, but the exam tests whether you know that `.ebextensions` is needed for custom installation steps or system-level dependencies that `pip` alone cannot handle.
Detailed technical explanation
How to think about this question
Under the hood, `.ebextensions` files are YAML or JSON configuration files that Elastic Beanstalk processes using the AWS CloudFormation stack that manages the environment. The `commands` key runs commands as the root user before the application is deployed, making it ideal for installing system packages or Python packages that require elevated privileges. A real-world scenario where this matters is when a Python package depends on a native library (e.g., `psycopg2` requiring `libpq-dev`); you can use `.ebextensions` to install the system dependency first, then rely on `requirements.txt` for the Python package.
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?
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 `.ebextensions` configuration files allow you to run custom commands during environment provisioning. By placing a `.config` file in the `.ebextensions` directory of your source bundle, you can use the `commands` key to execute a shell command (e.g., `pip install <package>`) on each EC2 instance before the application starts. This ensures the required Python package is installed on all environment instances as part of the deployment lifecycle.
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.
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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