KCNA Kubernetes Fundamentals Practice Question
Which TWO statements about Kubernetes Services are correct?
⚠ Common exam trap
Test-takers frequently confuse the Service's role in providing a stable IP with the idea that it also handles scaling, or they mistakenly think Services are restricted to a single namespace or type, when in fact they are flexible across namespaces and types.
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
✓
A Service provides a stable IP address for Pods
A Kubernetes Service provides a stable virtual IP address that remains constant even as the underlying Pods are created, destroyed, or rescheduled. This decouples clients from the ephemeral nature of Pod IPs, ensuring reliable connectivity within the 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.
- ✗
A Service can only route traffic to Pods in the same namespace
Why it's wrong here
Services can route traffic to any Pods selected by labels, regardless of namespace, but typically within the same cluster.
- ✗
A Service can only be of type ClusterIP
Why it's wrong here
Kubernetes supports multiple Service types: ClusterIP, NodePort, LoadBalancer, and ExternalName.
- ✗
A Service automatically scales Pods based on load
Why it's wrong here
Scaling is handled by Deployments or HorizontalPodAutoscalers, not Services.
- ✓
A Service provides a stable IP address for Pods
Why this is correct
Services have a virtual IP that remains stable even as Pods change.
- ✓
A Service uses selectors to identify target Pods
Why this is correct
Services use label selectors to determine which Pods receive traffic.
Go deeper
Related to this question
Learn chapter
Kubernetes Overview and Core Components
Key term
ReplicaSet and Replication
A ReplicaSet ensures a specified number of identical pod instances are running at all times in Kubernetes, using replication to maintain availability and stability.
Key term
Kubernetes API Primitives
Kubernetes API Primitives are the basic building blocks that the Kubernetes API uses to represent and manage the state of a cluster, such as Pods, Services, Deployments, and Namespaces.
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