What is the difference between Vertical Pod Autoscaler (VPA) and Horizontal Pod Autoscaler (HPA)?

Question

Kubernetes Fundamentals — Hard

What is the difference between Vertical Pod Autoscaler (VPA) and Horizontal Pod Autoscaler (HPA)?

Accepted Answer

The correct answer distinguishes between scaling out with HPA and scaling up with VPA. HPA adjusts pod replicas, while VPA adjusts resource limits. Incorrect options misrepresent their functions.