What is the purpose of a Persistent Volume in Kubernetes?

• A. To store ephemeral data
• B. To provide a durable storage resource in the cluster
• C. To route network traffic
• D. To manage configuration data

Answer: (B)

Persistent volumes provide durable storage in the cluster that persists beyond the life of any individual pod. This decouples storage from application pods, so data isn’t lost if a pod restarts, reschedules, or moves to another node. A PV is a cluster-wide resource backed by a concrete storage backend (such as a cloud disk, NFS, or local disk) and can be created by an admin or provisioned automatically via a StorageClass. A pod requests storage by using a PersistentVolumeClaim, and the control plane binds a PV to that claim so the pod can mount the volume. This setup gives data longevity and portability across pod lifecycles.

(Other options describe different concepts: routing network traffic is handled by Services/Ingress, and configuration data is managed with ConfigMaps/Secrets.)