Certified Kubernetes Application Developer (CKAD) Practice Test

The command that retrieves node information in a Kubernetes cluster is "kubectl get nodes -o wide." This command does a couple of things:

Firstly, "kubectl get nodes" fetches a list of all the nodes in the Kubernetes cluster along with their status, roles, age, and version details. The additional flag “-o wide” expands the output to include more detailed information about each node, such as their internal IP address, external IP address (if applicable), and other relevant metadata. This comprehensive output aids in understanding the full capacity and health of the nodes available in the environment.

The other commands mentioned do not correctly retrieve node information as required. For instance, "kubectl view nodes" and "kubectl list nodes" are not valid Kubernetes commands, which would lead to errors if executed. Meanwhile, "kubectl inspect nodes" does not exist within the kubectl command set, as the inspect functionality is more commonly associated with other tools in different contexts, such as Docker. Thus, the command "kubectl get nodes -o wide" stands out as the accurate and effective way to retrieve and view detailed node information within a Kubernetes cluster.