This KCNA practice question tests your understanding of kubernetes fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO statements about Kubernetes Services are correct?
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
Option D is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
✓
A Service uses selectors to identify target Pods
Why this is correct
Services use label selectors to determine which Pods receive traffic.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often 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.
Detailed technical explanation
How to think about this question
Under the hood, a Service of type ClusterIP is assigned a virtual IP from a predefined range (e.g., 10.96.0.0/12) and uses iptables or IPVS rules on each node to load-balance traffic to the Pods matching its selector. The kube-proxy component watches the API server for Service and EndpointSlice changes, updating these rules dynamically. A real-world scenario: if a Pod crashes and is recreated with a new IP, the Service's endpoints are updated automatically, ensuring zero downtime for clients using the stable Service IP.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this KCNA question in full detail.
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A Service provides a stable IP address for Pods — Option D is correct because 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.
What should I do if I get this KCNA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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