Certified Kubernetes Application Developer (CKAD) Practice Test 2026 - Free CKAD Practice Questions and Comprehensive Study Guide

The purpose of probes in Kubernetes is to perform health checks on containers. Probes are mechanisms that allow Kubernetes to determine the health and readiness of an application running inside a container. There are two main types of probes: readiness probes and liveness probes.

Readiness probes indicate whether a container is ready to service requests. If a container fails its readiness probe, Kubernetes will stop routing traffic to that container until it passes the probe check again. This is important for ensuring that traffic is only sent to containers that are actually up and running properly.

Liveness probes, on the other hand, determine whether a container is still running. If a liveness probe fails, Kubernetes can take action to restart the container, thus helping to recover from situations where the application has crashed or become unresponsive.

By using these probes, Kubernetes can ensure higher availability and reliability of the applications running in the cluster, as it can effectively manage the lifecycle of containers based on their health status.

The other options discuss topics that are not related to the primary function of probes in Kubernetes. Managing user permissions pertains to security roles and access control, scaling applications involves the Horizontal Pod Autoscaler and metrics, while network security relates to protecting the network traffic and not directly to health checks of containers.