easyMultiple ChoiceObjective-mapped
CV0-004 Practice Question: Migrating its on-premises application to the…
A company is migrating its on-premises application to the cloud and needs to ensure high availability. The application requires a stateless web tier and a stateful database tier. Which design approach BEST meets these requirements?
⚠ Common exam trap
CompTIA often tests the misconception that round-robin DNS or a single read replica provides high availability, but candidates must recognize that DNS-based load balancing lacks health checking and automatic failover, and a read replica cannot handle write failures, making multi-AZ replication essential for database 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
✓
Deploy web servers behind a load balancer and use a managed database with multi-AZ replication.
Deploying web servers behind a load balancer provides horizontal scaling and fault tolerance for the stateless web tier, while using a managed database with multi-AZ replication ensures automatic failover and data durability for the stateful database tier. This combination meets high availability requirements by eliminating single points of failure and providing redundancy across Availability 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.
- ✗
Deploy one large web server and one large database server.
Why it's wrong here
Single instances are single points of failure.
- ✓
Deploy web servers behind a load balancer and use a managed database with multi-AZ replication.
Why this is correct
Provides redundancy for both tiers.
- ✗
Use round-robin DNS for web servers and a read replica for the database.
Why it's wrong here
Round-robin DNS does not handle failures; read replica is not for failover.
- ✗
Use auto-scaling for web servers and a single database instance.
Why it's wrong here
Single database instance is not highly available.
Go deeper
Related to this question
About these practice questions
Courseiva writes every CV0-004 question from scratch — 977 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.