Certified Kubernetes Application Developer (CKAD) Practice Test 2025 - Free CKAD Practice Questions and Comprehensive Study Guide

The command to delete a defined Custom Resource in Kubernetes is accurate because it utilizes the `kubectl delete` command with the `-f` flag, which specifies that the resource should be removed based on a YAML file. This method is particularly effective because it allows Kubernetes to identify the exact definition of the resource you wish to delete by referencing the file where it was originally defined.

Using `kubectl delete -f customresource.yaml` ensures that the deletion action is applied to the resource configuration specified in the provided YAML file. This is vital as it maintains clarity and specificity in resource management.

Other options do not align with the standard commands used in Kubernetes. For instance, `kubectl remove customresource`, `kubectl unregister customresource`, and the concept of simply typing `kubectl delete customresource` without specifying the resource's kind or identifying the resource via a file are not part of the valid command syntax provided by Kubernetes. Thus, they wouldn't successfully execute a deletion of the Custom Resource as intended.