Explain Role-Based Access Control in Kubernetes. What are Roles, ClusterRoles, RoleBindings, and ClusterRoleBindings? How do you implement least-privilege access?

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Role-Based Access Control in Kubernetes controls who can perform what actions on which resources. RBAC enables fine-grained permission management, ensuring users and service accounts have only the access they need. Kubernetes RBAC uses four main resources that work together.