CV0-004 Cloud Architecture and Design Practice Question
A company wants to ensure fault tolerance for a critical application by deploying across multiple availability zones. Which THREE design decisions contribute to fault tolerance? (Select 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
✓
Placing a load balancer in front of the instances to distribute traffic
Deploying across multiple AZs, using load balancers to distribute traffic, and having redundant components in each AZ contribute to fault tolerance. Single instance and same AZ do not provide fault tolerance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using a single database instance without replication
Why it's wrong here
Single database is a single point of failure.
- ✓
Placing a load balancer in front of the instances to distribute traffic
Why this is correct
Load balancers distribute traffic and can route away from failed instances.
- ✓
Deploying application instances in at least two availability zones
Why this is correct
Multiple AZs protect against an AZ failure.
- ✓
Implementing duplicate components (N+1 redundancy) in each tier
Why this is correct
Redundant components ensure no single point of failure.
- ✗
Using a single large instance in one AZ
Why it's wrong here
Single instance in one AZ is a single point of failure.
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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.