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

The resource used to manage user permissions and access control in Kubernetes is Roles. Roles define a set of permissions within a specific namespace, allowing you to specify what actions users can perform on Kubernetes resources. This means that by creating a Role, you can control access to resources, like Pods or Services, granting or restricting privileges based on the user’s needs or role within an organization.

Roles can be used in conjunction with RoleBindings to assign those permissions to specific users or sets of users, making it an essential part of Kubernetes' security model. By segregating permissions and allowing granular control, Roles help maintain a secure environment where only authorized personnel can perform certain actions.

Clusters, on the other hand, are the highest level of abstraction in Kubernetes that encompasses all resources and do not specifically relate to user access. Deployments manage the lifecycle of applications rather than permissions. Namespaces are used for organizing resources but do not directly handle user permissions or access control. Thus, the use of Roles is integral for managing access and ensuring that users can only perform tasks they are authorized for.