Which statement best describes the role of kube-state-metrics?

• A. It provides DNS records for services
• B. It exposes cluster state data for monitoring
• C. It stores cluster configuration
• D. It schedules pods on nodes

Answer: (B)

The main idea here is that kube-state-metrics acts as an exporter that makes the cluster’s current state visible as metrics for monitoring. It reads the Kubernetes API server and exposes statistics about resources—things like how many pods are running, pending, or failed; the desired versus current replica counts for deployments; node conditions; and other object statuses. This data is what Prometheus (or similar tools) uses to build dashboards and alerts, reflecting the actual state of the cluster rather than performing actions.

It’s not about providing DNS records, storing cluster configuration, or scheduling workloads. DNS for services comes from components like CoreDNS, etcd stores the cluster configuration, and the scheduler decides where to place pods. So describing kube-state-metrics as exposing cluster state data for monitoring captures its role precisely.