- A
Set the deployment policy to 'Rolling'
Rolling updates instances in batches, keeping the application available.
- B
Set the deployment policy to 'Immutable'
Why wrong: Immutable creates new instances and swaps, but Rolling is more appropriate for minimizing cost and downtime.
- C
Set the deployment policy to 'All at once'
Why wrong: All at once updates all instances simultaneously, causing downtime.
- D
Set the deployment policy to 'Blue/green'
Why wrong: Blue/green is also valid but requires additional setup like a swap URL; Rolling is simpler.
Question 1,175 of 1,616
Rolling Deployment Policy — Minimize Downtime | AWS Developer Associate Explained
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 developer has updated the application code and wants to deploy the new version with a rolling deployment strategy to minimize downtime. Which configuration should the developer use?
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
✓
Set the deployment policy to 'Rolling'
The 'Rolling' deployment policy in AWS Elastic Beanstalk updates instances in batches, moving the new application version into a subset of instances while keeping the rest serving traffic, which minimizes downtime by ensuring capacity is never fully reduced. This is the correct choice for a rolling update that balances speed and availability without requiring a full parallel environment.
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.
- ✓
Set the deployment policy to 'Rolling'
Why this is correct
Rolling updates instances in batches, keeping the application available.
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.
- ✗
Set the deployment policy to 'Immutable'
Why it's wrong here
Immutable creates new instances and swaps, but Rolling is more appropriate for minimizing cost and downtime.
- ✗
Set the deployment policy to 'All at once'
Why it's wrong here
All at once updates all instances simultaneously, causing downtime.
- ✗
Set the deployment policy to 'Blue/green'
Why it's wrong here
Blue/green is also valid but requires additional setup like a swap URL; Rolling is simpler.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'Rolling' with 'Blue/green' because both aim to reduce downtime, but Blue/green requires a separate environment and is not a rolling deployment within the same environment, while 'Immutable' is mistakenly chosen for its safety despite not being a rolling strategy.
Detailed technical explanation
How to think about this question
Under the hood, Elastic Beanstalk's 'Rolling' policy uses the environment's Auto Scaling group to replace instances in configurable batch sizes (e.g., 1 or a percentage), with an optional 'Pause' time between batches for health checks. A subtle behavior is that if health checks fail during a batch, the deployment is rolled back automatically, but the rolling process itself can still cause brief capacity reduction if the batch size is large relative to the total instance count. In a real-world scenario, a developer might choose 'Rolling with additional batch' to maintain full capacity by launching new instances before terminating old ones, but the question specifically asks for 'Rolling' to minimize downtime.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Set the deployment policy to 'Rolling' — The 'Rolling' deployment policy in AWS Elastic Beanstalk updates instances in batches, moving the new application version into a subset of instances while keeping the rest serving traffic, which minimizes downtime by ensuring capacity is never fully reduced. This is the correct choice for a rolling update that balances speed and availability without requiring a full parallel environment.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
2 more ways this is tested on DVA-C02
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 company uses AWS Elastic Beanstalk to deploy a web application. The developer wants to update the environment's configuration, such as instance type and environment variables, without causing downtime. Which deployment policy should the developer use?
easy- A.All at once
- B.Blue/green
- C.Immutable
- ✓ D.Rolling
Why D: The Rolling deployment policy is the correct choice because it updates instances in batches, replacing a subset of instances with the new configuration while keeping the rest running, thereby avoiding downtime. This allows environment variables and instance types to be changed incrementally without taking the entire application offline, as each batch is updated only after the previous batch remains healthy.
Variation 2. A developer is using AWS Elastic Beanstalk to deploy a web application. The developer needs to update the environment's configuration to use a larger instance type. What is the most efficient way to apply this change with minimal downtime?
easy- ✓ A.Update the environment configuration through the Elastic Beanstalk console or CLI, and use a rolling update strategy to apply the change to instances in batches.
- B.Perform a blue/green deployment by creating a new environment with the larger instance type, then swap the environment URLs.
- C.Modify the Auto Scaling group launch configuration directly to use the larger instance type, then manually terminate each instance.
- D.Terminate the current environment and create a new one with the larger instance type.
Why A: Option A is correct because Elastic Beanstalk supports rolling updates, which allow you to change the instance type by updating instances in batches, minimizing downtime. Options B, C, and D are incorrect: B involves blue/green deployment, which is more complex and not the most efficient for a simple configuration change; C is wrong because directly modifying the Auto Scaling group launch configuration may be overwritten by Elastic Beanstalk and does not leverage Elastic Beanstalk's managed rolling update; D causes full downtime by terminating and recreating the environment.
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Last reviewed: Jul 4, 2026
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