The answer is to use the Elastic Beanstalk console to deploy the previous application version. This is correct because Elastic Beanstalk stores all uploaded application versions, allowing you to redeploy any prior version directly to the existing environment without spinning up a new one, which instantly replaces the faulty code and restores the environment to a healthy state. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of deployment management and rollback strategies—a common trap is thinking you must create a new environment or use a swap URL, but the fastest and most resource-efficient fix is simply selecting the previous version from the console or CLI. Remember, Elastic Beanstalk keeps version history, so you never need to rebuild infrastructure to undo a bad deployment. Memory tip: "Version swap, not environment swap" — you’re swapping the code, not the compute.
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 company uses AWS Elastic Beanstalk to deploy a web application. The environment is currently running a previous version. The developer uploads a new application version and deploys it to the environment. After the deployment, the environment health status turns 'Severe' and the new version is not accessible. The developer needs to quickly revert to the previous working version. What should the developer do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the Elastic Beanstalk console to deploy the previous application version.
Option B is correct because Elastic Beanstalk allows you to deploy a previous application version directly from the console or CLI without creating a new environment. This action replaces the current application version in the existing environment, restoring the previously working code and resolving the health status. It is the fastest and most straightforward way to revert while preserving the environment's configuration and resources.
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.
✗
Create a new environment with the previous version and swap CNAMEs.
Why it's wrong here
This is more complex than simply deploying the old version to the existing environment.
✓
Use the Elastic Beanstalk console to deploy the previous application version.
Why this is correct
Elastic Beanstalk supports deploying a specific version directly.
Related concept
Read the scenario before looking for a memorised answer.
✗
Roll back the environment configuration to a previous saved configuration.
Why it's wrong here
Configuration rollback does not change the application version.
✗
Terminate the environment and launch a new one with the previous version.
Why it's wrong here
Terminating and creating a new environment is time-consuming and unnecessary.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'deploying a previous application version' (which directly fixes the code) with 'rolling back environment configuration' (which only affects settings), leading them to incorrectly choose Option C.
Detailed technical explanation
How to think about this question
Under the hood, Elastic Beanstalk uses an S3 bucket to store application versions, and deploying a previous version triggers a rolling update or immutable update (depending on the deployment policy) that replaces the application files on the existing EC2 instances without altering the environment's CloudFormation stack or configuration. In a real-world scenario, if the new version introduced a database schema change, a simple version rollback might not revert the database, so the developer would also need to restore a database snapshot—but the question focuses solely on reverting the application code.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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.
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 the Elastic Beanstalk console to deploy the previous application version. — Option B is correct because Elastic Beanstalk allows you to deploy a previous application version directly from the console or CLI without creating a new environment. This action replaces the current application version in the existing environment, restoring the previously working code and resolving the health status. It is the fastest and most straightforward way to revert while preserving the environment's configuration and resources.
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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Question Discussion
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