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CV0-004 Practice Question: A cloud administrator is deploying a web…
A cloud administrator is deploying a web application that must be highly available across two availability zones. The deployment includes an application load balancer and multiple EC2 instances. Which TWO configurations are required to meet the high availability requirement?
⚠ Common exam trap
Test-takers frequently confuse cross-zone load balancing (which optimizes traffic distribution) with the fundamental requirement of deploying resources across multiple AZs, leading them to select Option E instead of recognizing that multi-AZ instance placement is the non-negotiable prerequisite for high availability.
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
✓
Launch EC2 instances in at least two availability zones
Launching EC2 instances in at least two availability zones ensures that if one AZ fails, the application continues to serve traffic from the other AZ. This is a fundamental requirement for achieving high availability across AZs, as it distributes the compute capacity across physically separate data centers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Launch EC2 instances in at least two availability zones
Why this is correct
Distributes instances across zones to withstand zone failure.
- ✗
Use a single EC2 instance with an auto-recovery policy
Why it's wrong here
A single EC2 instance with an auto-recovery policy cannot provide high availability across two availability zones because it operates within a single zone; if that entire zone fails, the instance remains unreachable regardless of recovery. This option is tempting because auto-recovery automatically restarts an instance after a hardware failure, which would be correct for ensuring resilience within one zone, but the stem explicitly requires cross-zone fault tolerance.
- ✗
Set up health checks to automatically replace unhealthy instances
Why it's wrong here
Health checks are operational, not a deployment requirement for HA.
- ✓
Configure the load balancer to route traffic to both availability zones
Why this is correct
Ensures traffic reaches instances in both zones.
- ✗
Enable cross-zone load balancing on the ALB
Why it's wrong here
Cross-zone distributes traffic within a region, not a high availability requirement.
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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.