- A
Use .ebextensions configuration files in the application source bundle to install packages and run commands.
.ebextensions is the standard way to customize Elastic Beanstalk instances.
- B
Use AWS OpsWorks to manage the instances instead of Elastic Beanstalk.
Why wrong: The question asks for methods within Elastic Beanstalk.
- C
Create a custom AMI and specify it in the Elastic Beanstalk environment configuration.
Custom AMIs can be used to pre-configure software.
- D
Add user data to the Auto Scaling group launch configuration that Elastic Beanstalk creates.
Why wrong: User data can be used but is not the recommended method; .ebextensions is preferred.
- E
Modify the CloudFormation template generated by Elastic Beanstalk directly.
Why wrong: Directly modifying the template is not supported and can break the environment.
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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 company uses AWS Elastic Beanstalk to manage its web application. The DevOps team wants to customize the Amazon EC2 instances launched by Elastic Beanstalk. Which two methods can they use to achieve this? (Choose TWO.)
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
Use .ebextensions configuration files in the application source bundle to install packages and run commands.
Option A is correct because `.ebextensions` configuration files allow you to customize the EC2 instances launched by Elastic Beanstalk by installing packages, running commands, and configuring services during instance provisioning. These YAML or JSON files are placed in the `.ebextensions` folder of your application source bundle and are executed by the Elastic Beanstalk platform as part of the instance initialization process, providing a native and supported customization mechanism.
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 .ebextensions configuration files in the application source bundle to install packages and run commands.
Why this is correct
.ebextensions is the standard way to customize Elastic Beanstalk instances.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS OpsWorks to manage the instances instead of Elastic Beanstalk.
Why it's wrong here
The question asks for methods within Elastic Beanstalk.
- ✓
Create a custom AMI and specify it in the Elastic Beanstalk environment configuration.
Why this is correct
Custom AMIs can be used to pre-configure software.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Add user data to the Auto Scaling group launch configuration that Elastic Beanstalk creates.
Why it's wrong here
User data can be used but is not the recommended method; .ebextensions is preferred.
- ✗
Modify the CloudFormation template generated by Elastic Beanstalk directly.
Why it's wrong here
Directly modifying the template is not supported and can break the environment.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think they can directly modify the Auto Scaling group's launch configuration or the CloudFormation template, but Elastic Beanstalk treats these as managed resources and will revert any manual changes, making `.ebextensions` and custom AMIs the only supported customization methods.
Detailed technical explanation
How to think about this question
Under the hood, `.ebextensions` files are processed by the Elastic Beanstalk platform using the `cfn-init` helper script, which reads metadata from the CloudFormation stack that Elastic Beanstalk creates. This allows you to run commands with `cwd`, `env`, and `test` conditions, and install packages from repositories like yum, rubygems, or pip. Custom AMIs, on the other hand, must be created from the same platform version and region as the Elastic Beanstalk environment, and you specify the AMI ID in the environment's configuration under the 'Custom AMI' setting, which replaces the base platform AMI while retaining the platform's lifecycle hooks.
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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Configuration Management and IaC — study guide chapter
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use .ebextensions configuration files in the application source bundle to install packages and run commands. — Option A is correct because `.ebextensions` configuration files allow you to customize the EC2 instances launched by Elastic Beanstalk by installing packages, running commands, and configuring services during instance provisioning. These YAML or JSON files are placed in the `.ebextensions` folder of your application source bundle and are executed by the Elastic Beanstalk platform as part of the instance initialization process, providing a native and supported customization mechanism.
What should I do if I get this DOP-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.
About these practice questions
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Last reviewed: Jun 24, 2026
This DOP-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 DOP-C02 exam.
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