The answer is the Immutable deployment policy. This is the correct choice because it launches a completely new set of instances in a separate Auto Scaling group, deploys the new application version to them, and then performs a single, atomic swap of the Elastic Load Balancer traffic from the old instances to the new ones, ensuring zero downtime and minimizing risk by keeping the original environment fully intact until health checks pass. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of deployment policies that prioritize safety and rollback speed, often contrasting Immutable with Rolling or All at Once deployments—a common trap is confusing Immutable with Rolling with an additional batch, but remember that only Immutable creates a completely separate fleet. A useful memory tip: think “new fleet, swap traffic, old fleet as safety net” to recall that Immutable keeps the original environment untouched for instant rollback.
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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 SysOps administrator deploys a web application using AWS Elastic Beanstalk. The administrator wants to deploy a new application version with zero downtime and minimize the risk of failure by launching a completely new set of instances before swapping traffic. Which deployment policy should the administrator choose?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Immutable
The Immutable deployment policy (Option D) is correct because it launches a completely new set of instances in a separate Auto Scaling group, deploys the new application version to them, and then swaps the Elastic Load Balancer (ELB) traffic from the old instances to the new ones in a single, atomic swap. This ensures zero downtime and minimizes risk by keeping the original environment fully intact until the new instances pass health checks, allowing an immediate rollback by simply swapping traffic back.
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.
✗
All at once
Why it's wrong here
All instances are terminated and replaced at the same time, causing downtime.
✗
Rolling
Why it's wrong here
Instances are updated in batches, but during the update, some capacity is temporarily reduced, and rollback is harder.
✗
Rolling with additional batch
Why it's wrong here
Similar to rolling but with an extra batch of new instances. Still involves in-place updates and potential capacity issues.
✓
Immutable
Why this is correct
Deploys a full new Auto Scaling group with the new version, tests it, and then swaps traffic, ensuring zero downtime and easy rollback.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Rolling with additional batch' (Option C) with immutable deployments because both add new instances, but they fail to recognize that only Immutable launches a completely separate fleet and swaps traffic atomically, while Rolling with additional batch still modifies the existing environment and does not provide a full isolation or instant rollback capability.
Trap categories for this question
Similar concept trap
Similar to rolling but with an extra batch of new instances. Still involves in-place updates and potential capacity issues.
Detailed technical explanation
How to think about this question
Under the hood, Elastic Beanstalk's Immutable deployment creates a second Auto Scaling group and launches new EC2 instances with the new application version. Once all new instances pass health checks, the environment's load balancer target group is updated atomically to point to the new instances, and the old Auto Scaling group is terminated. This approach is analogous to a blue/green deployment within a single Elastic Beanstalk environment, and it is the only policy that guarantees zero downtime and a clean rollback by simply re-routing traffic to the original instances if the new version fails health checks.
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.
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Immutable — The Immutable deployment policy (Option D) is correct because it launches a completely new set of instances in a separate Auto Scaling group, deploys the new application version to them, and then swaps the Elastic Load Balancer (ELB) traffic from the old instances to the new ones in a single, atomic swap. This ensures zero downtime and minimizes risk by keeping the original environment fully intact until the new instances pass health checks, allowing an immediate rollback by simply swapping traffic back.
What should I do if I get this SOA-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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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. A SysOps administrator needs to deploy a new version of a web application to Amazon EC2 instances using AWS Elastic Beanstalk. The administrator wants to deploy the new version with zero downtime and validate the new version before routing production traffic to it. Which deployment policy should be used?
easy
A.All at once
B.Rolling
✓ C.Immutable
D.Traffic splitting
Why C: Immutable deployment is correct because it launches a completely new set of EC2 instances in a separate Auto Scaling group, deploys the new application version to them, and passes health checks before swapping the environment's CNAME record to point to the new instances. This ensures zero downtime and allows validation of the new version before any production traffic is routed to it, as the old instances remain untouched until the swap is complete.
Last reviewed: Jun 11, 2026
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This SOA-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 SOA-C02 exam.
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