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CV0-004 Practice Question: Needs to ensure that a web application can scale…
A cloud engineer needs to ensure that a web application can scale out automatically during traffic spikes. Which design best practice should be implemented?
⚠ Common exam trap
CompTIA often tests the distinction between vertical scaling (scaling up) and horizontal scaling (scaling out), where candidates mistakenly choose a larger instance size or a single powerful VM because they think 'more resources' is the solution, ignoring the need for automatic, elastic scaling and fault tolerance.
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
✓
Configure an auto scaling group with a load balancer.
An auto scaling group combined with a load balancer automatically adds or removes VM instances based on predefined metrics (e.g., CPU utilization, request count), ensuring the web application scales out horizontally during traffic spikes without manual intervention. This aligns with cloud elasticity best practices for handling variable workloads.
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 a larger instance size.
Why it's wrong here
Vertical scaling is not automatic and has limits.
- ✗
Use a single powerful VM with more vCPUs.
Why it's wrong here
This is vertical scaling, not automated.
- ✗
Manually provision additional VMs during peak times.
Why it's wrong here
Manual scaling is not automated.
- ✓
Configure an auto scaling group with a load balancer.
Why this is correct
Auto scaling automatically adjusts capacity.
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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.