KCNA Kubernetes Fundamentals Practice Question
Which three of the following are true about etcd in Kubernetes?
⚠ Common exam trap
Candidates often confuse etcd's watch functionality with message queuing, or incorrectly assume that any database with key-value storage is relational, leading them to select options B or D.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
etcd stores all cluster state, including Pods, ConfigMaps, and Secrets
Etcd is the primary datastore for Kubernetes, storing all cluster state including objects like Pods, ConfigMaps, and Secrets. This ensures that the Kubernetes API server has a consistent, authoritative source of truth for the entire cluster.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
etcd stores all cluster state, including Pods, ConfigMaps, and Secrets
Why this is correct
etcd is the backing store for all cluster data.
- ✗
etcd is a relational database
Why it's wrong here
It is a key-value store.
- ✓
etcd is a distributed, consistent key-value store
Why this is correct
etcd is designed for high availability and consistency.
- ✗
etcd can be used as a message queue
Why it's wrong here
It is not designed for queuing.
- ✓
etcd supports watches to monitor changes to keys
Why this is correct
Watches are used by controllers to react to changes.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the KCNA exam.