- A
Immutable
Why wrong: Immutable deployments also ensure zero downtime but are not the only option; the question asks for a policy that ensures no downtime and full registration before termination.
- B
Rolling with an additional batch
This policy adds new instances before removing old ones, ensuring zero downtime.
- C
Rolling
Why wrong: Rolling deployments can cause downtime if the batch size is not configured properly.
- D
All at once
Why wrong: All at once causes downtime.
Question 623 of 1,616
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 company uses AWS Elastic Beanstalk to deploy a web application. The development team wants to ensure that the deployment does not cause any downtime and that new instances are fully registered with the load balancer before old instances are terminated. Which deployment policy should they use?
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 an additional batch
The Rolling with an additional batch deployment policy launches a new batch of instances in addition to the current ones, registers them with the load balancer, and only then terminates the old instances. This ensures zero downtime because the new instances are fully serving traffic before any old instances are removed, unlike standard rolling deployments which terminate old instances before new ones are fully ready.
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.
- ✗
Immutable
Why it's wrong here
Immutable deployments also ensure zero downtime but are not the only option; the question asks for a policy that ensures no downtime and full registration before termination.
- ✓
Rolling with an additional batch
Why this is correct
This policy adds new instances before removing old ones, ensuring zero downtime.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Rolling
Why it's wrong here
Rolling deployments can cause downtime if the batch size is not configured properly.
- ✗
All at once
Why it's wrong here
All at once causes downtime.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Rolling with an additional batch' with 'Immutable' deployment, but the key distinction is that Immutable creates a completely separate environment and swaps URLs, while Rolling with an additional batch operates within the same environment by temporarily adding extra instances.
Detailed technical explanation
How to think about this question
Under the hood, Elastic Beanstalk's Rolling with an additional batch policy temporarily increases the Auto Scaling group's desired capacity by the batch size (e.g., 1 extra instance), allowing the load balancer to health-check and route traffic to the new instances before deregistering and terminating the old ones. This is particularly useful for applications with long startup times or connection draining requirements, as it guarantees that the minimum number of healthy instances never drops below the original count. The additional batch is removed after the deployment completes, restoring the original capacity.
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 an additional batch — The Rolling with an additional batch deployment policy launches a new batch of instances in addition to the current ones, registers them with the load balancer, and only then terminates the old instances. This ensures zero downtime because the new instances are fully serving traffic before any old instances are removed, unlike standard rolling deployments which terminate old instances before new ones are fully ready.
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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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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