Ingress Interview Questions

Why Ingress Matters in Interviews

Ingress is where internal cluster networking meets the outside world. Interviewers use this topic to check whether you understand Layer 7 traffic management and can design production-grade routing for web applications.

Common questions include explaining the difference between an Ingress resource and an Ingress controller, describing how you would expose multiple applications under a single domain with path-based routing, and handling TLS certificates using Secrets or cert-manager. You should also be ready to discuss the Gateway API as the successor to Ingress, what problems it solves around role separation and cross-namespace routing, and when you might still use a plain LoadBalancer Service instead. Candidates who can compare NGINX Ingress Controller with cloud-native alternatives like the ALB controller, and articulate tradeoffs around performance, cost, and operational complexity, stand out in interviews.