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

Resource limits for pods in Kubernetes can be enforced by setting ResourceQuotas in namespaces. ResourceQuotas provide a way to limit the total amount of resources (like CPU and memory) that can be consumed by all pods in a namespace. This ensures that no single namespace can overconsume the cluster's resources, which is crucial in a multi-tenant environment.

When a ResourceQuota is enforced, Kubernetes checks resource requests and limits set on individual pods against the defined quota for the namespace. If a pod attempts to request more resources than allowed by the quota, it will be rejected by the Kubernetes scheduler. This mechanism helps manage resource allocation effectively and prevents resource starvation for other namespaces and applications running in the cluster.

The other options do not provide mechanisms for enforcing resource limits. Service definitions are used for routing traffic to pods. ConfigMaps, while useful for managing configuration data, do not handle resource management. Attaching labels to pods is useful for organization and selection but does not control or enforce resource usage.