KCNA Kubernetes Fundamentals Practice Question
Which TWO statements about Kubernetes Services are correct?
⚠ Common exam trap
The KCNA exam often tests the misconception that a Service can only expose one port or that NodePort is node-specific, when in fact multiple ports are supported and NodePort opens the port on every node in the cluster.
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
✓
The default Service type is ClusterIP
The default Service type in Kubernetes is ClusterIP, which exposes the Service on a cluster-internal IP address. This means the Service is only reachable from within the cluster, providing a stable internal endpoint for pod-to-pod communication without external exposure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A Service can expose only one container port
Why it's wrong here
A Service can expose multiple ports with different names.
- ✗
A Service can only route traffic to pods on the same node as the Service
Why it's wrong here
Services route to any pod matching the selector, regardless of node.
- ✓
The default Service type is ClusterIP
Why this is correct
If no type is specified, ClusterIP is used.
- ✓
A Service provides a stable IP address and DNS name for a set of pods
Why this is correct
This is the primary function of a Service.
- ✗
A Service of type NodePort exposes the service only on the node where the pod is running
Why it's wrong here
NodePort exposes the service on every node in the cluster.
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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.