Kubernetes Ingress: Many ingress controllers, like NGINX or Traefik, support sticky?

Short answer: sessions by setting a cookie (e.g., nginx-ingress-controller) that ensures subsequent requests from the same client go to the same service instance.

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.