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KCNA · Question #62
KCNA Question #62: Real Exam Question with Answer & Explanation
The correct answer is A: etcd. etcd is the distributed key-value store that Kubernetes uses as its primary backing store for all cluster data, including configuration data, state data, and metadata.
Submitted by yousef_jo· May 4, 2026Kubernetes Fundamentals
Question
Which key-value store is used to persist Kubernetes cluster data?
Options
- Aetcd
- BZooKeeper
- CControlPlaneStore
- DRedis
Explanation
etcd is the distributed key-value store that Kubernetes uses as its primary backing store for all cluster data, including configuration data, state data, and metadata.
Common mistakes.
- B. Apache ZooKeeper is another distributed coordination service but is not used by default or as the primary data store for Kubernetes clusters.
- C. ControlPlaneStore is not a recognized or standard key-value store or component name within the Kubernetes architecture.
- D. Redis is an in-memory data structure store, often used as a database, cache, and message broker, but it is not the persistence layer for Kubernetes cluster state.
Concept tested. Kubernetes control plane components, etcd
Reference. https://kubernetes.io/docs/concepts/overview/components/#etcd
Topics
#Kubernetes core components#etcd#cluster data storage#key-value store
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