Kubernetes Interview Questions

A Pod is the smallest deployable unit: one or more containers sharing network and storage. A Deployment keeps a desired number of identical Pods running and handles rolling updates. A Service gives those changing Pods a stable DNS name and load-balances traffic across them.

Package the tests as an image and run them as a Kubernetes Job, with config from ConfigMaps and Secrets, resource requests and limits, backoffLimit 0 so failures are not silently retried, and results shipped out as artifacts. For isolation, deploy the app into an ephemeral namespace per pull request.

Deploy Grid 4 in hub-and-node or distributed mode, typically with the official docker-selenium Helm chart. Browser nodes run as pods, and KEDA's Selenium Grid scaler scales them from the session queue, often to zero. Size resources and shared memory, drain nodes after a session, and watch queue time.