CV0-004 Cloud Architecture and Design Practice Question
A cloud architect is designing a highly available application on AWS. The application must be fault-tolerant and able to withstand the failure of an entire Availability Zone. Which TWO actions should the architect take? (Select TWO.)
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
✓
Deploy EC2 instances across two or more Availability Zones
Deploying across multiple Availability Zones and using an auto scaling group across those zones ensures that if one zone fails, the application continues in the other zones.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Store application state on the local instance store
Why it's wrong here
Local instance store is ephemeral and not shared; state should be external for high availability.
- ✗
Deploy EC2 instances in a single Availability Zone
Why it's wrong here
Single zone cannot withstand zone failure.
- ✗
Use a single large EC2 instance
Why it's wrong here
Vertical scaling does not provide availability zone redundancy.
- ✓
Deploy EC2 instances across two or more Availability Zones
Why this is correct
Multiple zones provide redundancy for zone failure.
- ✓
Configure an Auto Scaling group to span multiple Availability Zones
Why this is correct
Auto Scaling across zones ensures capacity in each zone.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.