The answer is blue/green deployment. This strategy is correct because it creates a separate, new environment—the green environment—with the updated application and configuration, while the existing blue environment continues serving traffic with its locally stored state. Traffic is then switched to the green environment in a controlled cutover, minimizing downtime and allowing state to be offloaded to an external service like ElastiCache or an RDS database before the switch. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of deployment strategies for stateful applications, where rolling or immutable updates would cause state loss when instances are replaced. A common trap is choosing a rolling update, but remember that any strategy replacing instances in-place destroys local state. Memory tip: Blue/green keeps the old blue environment intact, so state is never lost during the transition—think “blue stays, green plays.”
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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 has a mission-critical application running on EC2 instances in an Auto Scaling group. The application stores state locally on the instance. The company wants to update the application to a new version with minimal downtime. The update requires a change to the instance configuration. What deployment strategy should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Blue/green deployment
A blue/green deployment creates a new environment (green) with the new version and then switches traffic. This minimizes downtime and allows state to be handled by offloading to an external service. Rolling updates would cause downtime and state loss if instances are replaced. Immutable updates replace instances, causing state loss. Canary deployments are for testing, not full production updates.
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 update
Why it's wrong here
Rolling updates replace instances one by one, causing state loss if state is stored locally.
✗
Canary deployment
Why it's wrong here
Canary deployments route a small percentage of traffic to new instances, but the state issue remains.
✗
Immutable update
Why it's wrong here
Immutable updates replace instances with new ones, causing state loss.
✓
Blue/green deployment
Why this is correct
Blue/green creates a new environment, allowing state to be migrated or offloaded, then switches traffic.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: Blue/green deployment — A blue/green deployment creates a new environment (green) with the new version and then switches traffic. This minimizes downtime and allows state to be handled by offloading to an external service. Rolling updates would cause downtime and state loss if instances are replaced. Immutable updates replace instances, causing state loss. Canary deployments are for testing, not full production updates.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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