SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company runs a web application on a single EC2 instance. They want to improve availability and fault tolerance with minimal architectural changes. What should they do?
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 an Auto Scaling group with a minimum of two instances across two Availability Zones.
Using an Auto Scaling group with a minimum of two instances across two Availability Zones provides high availability and fault tolerance. If one Availability Zone fails, the other zone continues to serve traffic. Option A is wrong because multiple EBS volumes do not protect against instance or AZ failure. Option C is wrong because multiple subnets in the same Availability Zone still share the same failure domain. Option D is wrong because a larger instance type does not add redundancy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Attach multiple EBS volumes to the instance.
Why it's wrong here
Multiple volumes do not protect against instance or AZ failure.
- ✓
Use an Auto Scaling group with a minimum of two instances across two Availability Zones.
Why this is correct
Spreading instances across AZs provides high availability and fault tolerance.
- ✗
Create multiple subnets in the same Availability Zone.
Why it's wrong here
Single Availability Zone is a single point of failure.
- ✗
Upgrade to a larger instance type.
Why it's wrong here
Larger instance does not provide fault tolerance.
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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.