CV0-004 Cloud Architecture and Design Practice Question
A company runs a stateless web application on virtual machines. To handle increased traffic, they add more virtual machines and distribute incoming requests among them. What is this scaling method called?
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
✓
Horizontal scaling
Horizontal scaling adds more instances to handle load, as opposed to vertical scaling which increases the resources of a single instance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Right-sizing
Why it's wrong here
Right-sizing is adjusting instance size to match workload.
- ✗
Vertical scaling
Why it's wrong here
Vertical scaling increases resources (CPU/RAM) of an existing instance.
- ✗
Auto-scaling
Why it's wrong here
Auto-scaling automates the scaling process, but the method can be horizontal or vertical.
- ✓
Horizontal scaling
Why this is correct
Horizontal scaling adds more instances.
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Written by Johnson Ajibi, MSc IT Security
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