SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company is running a production web application on AWS Auto Scaling EC2 instances behind an Application Load Balancer. Recent deployments have caused intermittent errors. The team wants to implement a deployment strategy that minimizes downtime and allows for quick rollback. Which strategy 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
✓
Use blue/green deployment with a second Auto Scaling group and switch the ALB target group.
Blue/green deployment with a second Auto Scaling group and ALB switch allows instant rollback by switching back to the original environment. Option A is wrong because rolling updates with a single ASG can still cause partial downtime and slower rollback. Option C is wrong because it does not minimize downtime and requires manual intervention. Option D is wrong because immutable deployments replace instances, but rollback requires redeployment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Deploy a new version to a single instance, test, then scale out.
Why it's wrong here
This does not ensure zero downtime and requires manual scaling.
- ✓
Use blue/green deployment with a second Auto Scaling group and switch the ALB target group.
Why this is correct
Blue/green allows instant switch and immediate rollback.
- ✗
Perform rolling updates with a single Auto Scaling group, updating a few instances at a time.
Why it's wrong here
Rolling updates can cause partial downtime and slow rollback.
- ✗
Use an immutable deployment by launching a new Auto Scaling group and terminating the old one.
Why it's wrong here
Immutable requires redeployment for rollback, not instant.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-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 SAP-C02 exam.