Design a Kubernetes platform that runs and autoscales user apps

Design a platform on Kubernetes where users upload their application runtimes and the platform runs them, scaling each one up and down with the load it receives.

Cover how an upload becomes something Kubernetes can run, how traffic reaches each app, what signals drive scaling and how fast it reacts, and how apps from different users are kept apart. Be ready to defend each choice: the interviewer kept asking why you would do it that way.