CV0-004 Cloud Architecture and Design Practice Question
A company is designing an auto-scaling solution for a stateless application. Which TWO features are essential for the application to scale horizontally without issues? (Select 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
✓
Stateless application design
Horizontal scaling requires that the application is stateless, meaning no session data is stored locally on instances, so any instance can handle any request. A load balancer is essential to distribute incoming traffic across multiple instances, ensuring no single instance is overwhelmed and that requests can be sent to any available instance. In contrast, stateful session management (B) and local storage (C) would tie data to specific instances, preventing seamless scaling. Vertical scaling (D) is about increasing resources of existing instances, not adding more instances horizontally.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Stateless application design
Why this is correct
Stateless design allows any instance to handle any request without session affinity.
- ✗
Stateful session management
Why it's wrong here
Stateful sessions complicate horizontal scaling because sessions need to be tracked across instances.
- ✗
Use of local storage for application data
Why it's wrong here
Local storage is ephemeral; data would be lost when instances are terminated.
- ✗
Vertical scaling on the existing instances
Why it's wrong here
Vertical scaling does not support horizontal scaling; it adds resources to a single instance.
- ✓
A load balancer to distribute traffic
Why this is correct
A load balancer evenly distributes incoming requests across instances.
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Written by Johnson Ajibi, MSc IT Security
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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.