The answer is to update the CloudFormation template that manages the environment to reference the new AMI ID and perform a stack update. This is correct because every Elastic Beanstalk environment is fundamentally an AWS CloudFormation stack, so modifying the template triggers a rolling or immutable update that replaces the EC2 instances with the new custom AMI while preserving the environment’s DNS name, configuration, and other resources. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding that Elastic Beanstalk does not offer a direct “update AMI” button; the most efficient method is to leverage the underlying CloudFormation stack rather than creating a new environment or manually replacing instances. A common trap is assuming you can simply change the AMI in the environment configuration, but that option is not available for custom AMIs. Memory tip: think “CFN stack = EB backbone” — to update the AMI, update the stack.
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 deploy a web application. The application requires a custom Amazon Machine Image (AMI) for its EC2 instances. The DevOps team updates the AMI monthly. What is the most efficient way to update the Elastic Beanstalk environment to use the new AMI?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Update the CloudFormation template that manages the environment to reference the new AMI ID, and perform a stack update
Option D is correct because Elastic Beanstalk environments are built on AWS CloudFormation stacks. Updating the CloudFormation template that manages the environment to reference the new AMI ID and performing a stack update triggers a rolling or immutable update that replaces EC2 instances with the new AMI while preserving the environment configuration, DNS name, and other resources. This is the most efficient and supported method for updating the AMI in an existing environment without creating a new one.
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 Elastic Beanstalk console to modify the launch configuration's AMI ID
Why it's wrong here
The console does not allow direct modification of the launch configuration AMI.
✗
Create a new Elastic Beanstalk environment with the new AMI and swap the environment URL
Why it's wrong here
This works but is less efficient than an in-place update.
✗
Use the AWS CLI command aws elasticbeanstalk update-environment with the new AMI ID
Why it's wrong here
The update-environment command does not accept AMI ID directly.
✓
Update the CloudFormation template that manages the environment to reference the new AMI ID, and perform a stack update
Why this is correct
This allows controlled updates with rollback capability.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume they can directly update the AMI via the Elastic Beanstalk console or CLI commands like 'update-environment', but Elastic Beanstalk abstracts the underlying CloudFormation stack, and the only supported way to change the AMI for an existing environment is through a configuration file (.ebextensions) or by updating the CloudFormation template that manages the environment.
Trap categories for this question
Command / output trap
The update-environment command does not accept AMI ID directly.
Detailed technical explanation
How to think about this question
Under the hood, Elastic Beanstalk uses CloudFormation to manage the underlying resources, including Auto Scaling groups and launch configurations or launch templates. When you update the CloudFormation template to reference a new AMI ID and perform a stack update, Elastic Beanstalk triggers an instance replacement based on the update policy (e.g., rolling, rolling with batch, or immutable), ensuring minimal downtime. A subtle behavior is that if you use a custom AMI, you must also ensure the AMI is in the same region and that the instance profile has permissions to launch it; otherwise, the stack update will fail.
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.
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: Update the CloudFormation template that manages the environment to reference the new AMI ID, and perform a stack update — Option D is correct because Elastic Beanstalk environments are built on AWS CloudFormation stacks. Updating the CloudFormation template that manages the environment to reference the new AMI ID and performing a stack update triggers a rolling or immutable update that replaces EC2 instances with the new AMI while preserving the environment configuration, DNS name, and other resources. This is the most efficient and supported method for updating the AMI in an existing environment without creating a new one.
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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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An organization uses AWS Elastic Beanstalk to manage a production web application. The application uses a custom AMI that needs to be updated periodically. The team wants to automate the process of updating the AMI and deploying it to the environment with zero downtime. Which THREE steps should the team include in the automation? (Choose THREE.)
medium
A.Delete the environment and recreate it with the new AMI.
✓ B.Build a new AMI using a tool like Packer and store it in EC2 Image Builder.
✓ C.Use Elastic Beanstalk's immutable update policy to replace instances with new ones.
✓ D.Update the Elastic Beanstalk environment configuration to use the new AMI ID.
E.Terminate all existing instances and allow Auto Scaling to launch new ones with the new AMI.
Why B: Options A, C, and E are correct. Option A creates a new AMI version. Option C updates the environment configuration with a rolling update to minimize downtime. Option E uses an immutable update for zero downtime. Option B is incorrect because terminating instances without a deployment strategy causes downtime. Option D is incorrect because deleting the environment is disruptive.
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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.
Question Discussion
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