- A
Rolling with additional batch
This policy adds an extra batch of instances before starting the rolling update, ensuring that capacity never drops below the original number of instances, thus maintaining full capacity and minimizing downtime.
- B
All at once
Why wrong: All at once terminates all existing instances and deploys new ones, causing downtime and a temporary loss of capacity.
- C
Rolling
Why wrong: Rolling replaces instances in batches but does not add extra instances; capacity may drop slightly during the deployment.
- D
Immutable
Why wrong: Immutable deployments create a completely new environment with new instances, then swap CNAMEs. This maintains capacity but doubles the number of instances temporarily; it does not keep the exact same number of instances at all times.
Quick Answer
The correct answer is rolling with additional batch deployment. This policy is the right choice because it first launches a new batch of instances alongside the existing ones, ensuring the environment maintains full capacity throughout the entire deployment process. Once the new instances pass health checks and begin serving traffic, the original instances are updated in batches, and the initial batch is terminated only after the new ones are fully operational, which minimizes downtime. On the AWS Certified Developer Associate DVA-C02 exam, this question tests your understanding of Elastic Beanstalk deployment policies and their trade-offs between capacity preservation and downtime. A common trap is confusing this with the standard rolling deployment, which reduces capacity during updates, or with immutable deployments, which fully replaces the environment. Remember the key distinction: rolling with additional batch adds before it removes, so think “add first, then roll.” A helpful memory tip is “AB” for Additional Batch — Always add Before you subtract.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 deploying a web application on AWS Elastic Beanstalk. The environment must maintain the same number of running instances throughout the deployment to ensure capacity. The developer also wants to minimize downtime. Which deployment policy should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
Rolling with additional batch
Rolling with additional batch is correct because it first launches a new batch of instances in addition to the existing ones, ensuring full capacity is maintained throughout the deployment. Once the new instances are healthy, instances are updated in batches, and the original batch is terminated only after the new ones are fully serving traffic, minimizing downtime.
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.
- ✓
Rolling with additional batch
Why this is correct
This policy adds an extra batch of instances before starting the rolling update, ensuring that capacity never drops below the original number of instances, thus maintaining full capacity and minimizing downtime.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
All at once
Why it's wrong here
All at once terminates all existing instances and deploys new ones, causing downtime and a temporary loss of capacity.
- ✗
Rolling
Why it's wrong here
Rolling replaces instances in batches but does not add extra instances; capacity may drop slightly during the deployment.
- ✗
Immutable
Why it's wrong here
Immutable deployments create a completely new environment with new instances, then swap CNAMEs. This maintains capacity but doubles the number of instances temporarily; it does not keep the exact same number of instances at all times.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'rolling' with 'rolling with additional batch,' assuming both maintain capacity, but only the latter adds extra instances upfront to avoid any capacity reduction during the update.
Detailed technical explanation
How to think about this question
Under the hood, Elastic Beanstalk's rolling with additional batch policy uses an extra temporary Auto Scaling group to launch the additional batch, ensuring the original group's capacity remains unchanged. This approach is ideal for production environments where traffic must be served continuously, as the new instances are added to the load balancer before any old instances are removed, preventing any drop in request handling capacity. A subtle behavior is that the additional batch is terminated after the deployment completes, so you pay for extra instances only during the deployment window.
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: Rolling with additional batch — Rolling with additional batch is correct because it first launches a new batch of instances in addition to the existing ones, ensuring full capacity is maintained throughout the deployment. Once the new instances are healthy, instances are updated in batches, and the original batch is terminated only after the new ones are fully serving traffic, minimizing downtime.
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: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 11, 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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