Administering Windows Server Hybrid Core Infrastructure (AZ-800) Practice

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A Kubernetes cluster must contain at least one master node and what else?

One or more storage nodes
One or more worker nodes
One or more network nodes
One or more database nodes

The correct answer is: One or more worker nodes

In a Kubernetes cluster, the architecture requires at least one master node, which is responsible for managing the cluster and orchestrating the deployment, scaling, and operation of applications running on the cluster. However, to run applications, the cluster must also include one or more worker nodes. Worker nodes are where the containers are actually executed. They host the necessary components, such as the container runtime, kubelet, and kube-proxy, that manage the containers and communicate with the master node. Each worker node has the capability to run one or more pods, which encapsulate the application components. Having at least one worker node is essential because without it, there would be no environment to deploy and run the applications that the master node orchestrates. This is fundamental for ensuring that a Kubernetes cluster can fulfill its primary purpose of handling containerized applications. The other options focus on components that are not strictly required for a Kubernetes cluster to function. While storage, network, and database nodes may play important roles in specific setups or configurations, the core operational requirement focuses on the relationship between master and worker nodes.