Certified Kubernetes Administrator (CKA) Practice Test

A Kubernetes node typically runs the kubelet and kube-proxy, making this the correct choice.

The kubelet is an essential component of a Kubernetes node, as it is responsible for managing the containers that are running on that node. It ensures that the desired state of the pods is maintained according to what is specified in the cluster's workload configuration. The kubelet listens for instructions from the Kubernetes API server, managing the lifecycle of the containers, and reporting the status of the node back to the control plane.

Additionally, kube-proxy is responsible for maintaining network rules on the node, which enable the networking aspect of service discovery. It handles the traffic for services and forwards it to the appropriate container endpoints, ensuring that the services can communicate within and outside of the cluster.

In contrast, the kube-scheduler and kube-controller-manager are parts of the control plane and typically run on the master nodes, not on the worker nodes. The etcd service, which serves as a key-value store for all cluster data, also runs on the control plane and handles cluster state. Lastly, the kubectl interface is a command-line tool for interacting with the Kubernetes cluster and is not executed on any node within the cluster itself but rather on the user's workstation or administrative control