How would you answer an interview scenario involving Ingress controllers in Ingress?

For an interview scenario involving Ingress controllers, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. An Ingress controller watches Ingress resources and configures a data-plane proxy or load balancer to enforce those rules. In this scenario, you must migrate from one Ingress controller to another. Explain what configuration you would inspect for portability risks. For production, minimize controller-specific features, version controllers deliberately, monitor them, and isolate critical configuration changes. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.