What is the function of Kubernetes Deployment?

What is the function of Kubernetes Deployment?

• A. It stores configuration data as key-value pairs
• B. It provides an object that delivers declarative updates for applications
• C. It defines the networking policy
• D. It manages persistent storage

Answer: (B)

A Deployment is the Kubernetes object that lets you describe how your application should run and be updated over time. You declare the desired state—how many replicas, the pod template with the container image and resources, and update strategy—and the Deployment controller ensures the actual state matches that declaration. It manages the lifecycle by creating and updating ReplicaSets and Pods, enables rolling updates to replace old pods with new ones smoothly, and supports rollbacks if something goes wrong. This declarative approach makes deployments repeatable and automated. For context, other resources handle different responsibilities: a ConfigMap stores configuration data as key-value pairs, a NetworkPolicy defines how pods can communicate, and a PersistentVolume/PersistentVolumeClaim handles durable storage.

A Deployment is the Kubernetes object that lets you describe how your application should run and be updated over time. You declare the desired state—how many replicas, the pod template with the container image and resources, and update strategy—and the Deployment controller ensures the actual state matches that declaration. It manages the lifecycle by creating and updating ReplicaSets and Pods, enables rolling updates to replace old pods with new ones smoothly, and supports rollbacks if something goes wrong. This declarative approach makes deployments repeatable and automated.

For context, other resources handle different responsibilities: a ConfigMap stores configuration data as key-value pairs, a NetworkPolicy defines how pods can communicate, and a PersistentVolume/PersistentVolumeClaim handles durable storage.