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

When defining a Custom Resource Definition (CRD) in Kubernetes, the correct API version to use is apiextensions.k8s.io/v1. This API version is specifically designed to manage and interact with custom resources in Kubernetes, enabling users to extend the Kubernetes API with their own resource types.

Custom Resource Definitions allow users to define resources that are not included in the standard Kubernetes API, thus facilitating the extension of Kubernetes capabilities. The apiextensions.k8s.io API group provides the necessary tools to create these definitions so that Kubernetes can understand and manage the new resource types effectively.

Using apiextensions.k8s.io/v1 is critical because it ensures compatibility with the most recent features and practices surrounding CRDs in Kubernetes. Additionally, this API version includes enhancements over prior versions, such as validation schemas for custom resources and support for more robust resource handling.

The other API versions listed relate to different aspects of Kubernetes resources and are not suitable for defining CRDs. For example, apps/v1 is used for defining various types of applications like Deployments and StatefulSets, while v1 typically refers to core resources such as Pods and Services. Extensions resources like extensions/v1beta1 were utilized in earlier versions of Kubernetes but have since been deprecated in favor of