CV0-004 Cloud Architecture and Design Practice Question
A company is designing a highly available architecture for a critical application. The solution must tolerate the failure of an entire availability zone. Which TWO design principles should be implemented? (Choose 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
✓
Use a load balancer with health checks and cross-zone load balancing
To tolerate an AZ failure, deploy across multiple AZs and use active-active or active-passive with failover. So deploying across multiple AZs and using a load balancer with health checks to route traffic away from failed AZ are correct.
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 instances in a single availability zone
Why it's wrong here
Single AZ does not tolerate an AZ failure.
- ✗
Use RAID 0 for all instance storage
Why it's wrong here
RAID 0 provides no redundancy; it increases performance but not fault tolerance.
- ✗
Use a single load balancer without health checks
Why it's wrong here
Health checks are needed to detect failures; a single load balancer is a single point of failure.
- ✓
Use a load balancer with health checks and cross-zone load balancing
Why this is correct
Correct. Health checks and cross-zone balancing help route traffic to healthy instances.
- ✓
Deploy instances across multiple availability zones
Why this is correct
Correct. Distributing across AZs provides AZ-level fault tolerance.
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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.