CV0-004 Troubleshooting Practice Question
A cloud architect is designing a highly available web application. Which THREE of the following components should be configured in at least two availability zones? (Choose THREE.)
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
✓
Web server instances
To achieve high availability across AZs, the load balancer, application servers, and database should be multi-AZ. Auto-scaling groups can launch instances across AZs, but they are not a component themselves; they are a management service. The DNS service is globally redundant by nature, not usually limited to AZs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Web server instances
Why this is correct
Instances should be deployed across AZs to handle requests if one AZ fails.
- ✓
Application load balancer
Why this is correct
The load balancer should be multi-AZ to distribute traffic and survive AZ failure.
- ✓
Database instance (primary and standby)
Why this is correct
A multi-AZ database provides automatic failover if the primary fails.
- ✗
DNS service (e.g., Route 53)
Why it's wrong here
DNS is inherently global and not restricted to AZs.
- ✗
Auto-scaling group
Why it's wrong here
Auto-scaling groups can span AZs, but they are not a component that needs to be in AZs; they are a control plane.
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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.