- A
Manually update EC2 instances in the environment.
Why wrong: Manual updates are error-prone and not recommended.
- B
Use environment configuration files (.ebextensions) to manage settings.
Configuration files ensure consistent deployments.
- C
Use a blue/green deployment to minimize downtime.
Blue/green deployments reduce risk.
- D
Deploy to a staging environment before production.
Staging environments allow testing before production.
- E
Always use the default Elastic Beanstalk domain for production.
Why wrong: Custom domains are recommended for production.
Question 814 of 1,616
Elastic Beanstalk Deployment Best Practices — .ebextensions, Blue/Green, Staging
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.
Which THREE are best practices for deploying applications with AWS Elastic Beanstalk? (Choose THREE.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 environment configuration files (.ebextensions) to manage settings.
Option B is correct because .ebextensions configuration files allow you to define environment settings, software configurations, and custom resources declaratively, ensuring consistent and repeatable deployments without manual intervention. This aligns with the best practice of infrastructure as code, as Elastic Beanstalk automatically applies these settings during environment creation and updates.
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.
- ✗
Manually update EC2 instances in the environment.
Why it's wrong here
Manual updates are error-prone and not recommended.
- ✓
Use environment configuration files (.ebextensions) to manage settings.
Why this is correct
Configuration files ensure consistent deployments.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use a blue/green deployment to minimize downtime.
Why this is correct
Blue/green deployments reduce risk.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Deploy to a staging environment before production.
Why this is correct
Staging environments allow testing before production.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Always use the default Elastic Beanstalk domain for production.
Why it's wrong here
Custom domains are recommended for production.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think manual EC2 updates (Option A) are acceptable for quick fixes, but Elastic Beanstalk's managed updates and immutable deployments are designed to prevent configuration drift and ensure environment consistency.
Detailed technical explanation
How to think about this question
Under the hood, .ebextensions files are YAML or JSON documents placed in the .ebextensions directory of your application source bundle; they are processed by the Elastic Beanstalk platform during environment provisioning and updates, executing commands via cfn-init and cfn-hup scripts. A subtle behavior is that .ebextensions can also define AWS resources like DynamoDB tables or SQS queues using CloudFormation templates, enabling full-stack provisioning alongside the application. In a real-world scenario, using .ebextensions to set environment variables or install packages ensures that staging and production environments remain identical, preventing 'works on my machine' issues.
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: Use environment configuration files (.ebextensions) to manage settings. — Option B is correct because .ebextensions configuration files allow you to define environment settings, software configurations, and custom resources declaratively, ensuring consistent and repeatable deployments without manual intervention. This aligns with the best practice of infrastructure as code, as Elastic Beanstalk automatically applies these settings during environment creation and updates.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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