Horizontal Pod Autoscaling (HPA):?

Short answer: Scales the number of pod replicas based on observed CPU utilization, memory usage, or custom metrics (e.g., request count). Example: If the Order Service experiences a high load, Kubernetes can automatically add more pod replicas to handle the increased traffic.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.