This KCNA practice question tests your understanding of kubernetes fundamentals. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A DevOps engineer needs to expose a set of pods running an HTTP API to external clients. The pods are stateless and should be load-balanced. Which Kubernetes resource should they use?
StatefulSet with a headless Service
Why wrong: StatefulSet is for stateful applications, not needed here.
Ingress resource without a Service
Why wrong: Ingress requires a backend Service to route traffic to pods.
Service of type ClusterIP
Why wrong: ClusterIP is only accessible inside the cluster.
Service of type LoadBalancer
LoadBalancer exposes the service externally and provides load balancing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Service of type LoadBalancer
A Service of type LoadBalancer is the correct choice because it provisions an external load balancer (e.g., an AWS ELB or Azure LB) that distributes incoming traffic across the pods, exposing the stateless HTTP API to external clients. This resource automatically assigns a public IP and handles load balancing without requiring manual proxy configuration, making it ideal for external access to stateless workloads.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
StatefulSet with a headless Service
Why it's wrong here
StatefulSet is for stateful applications, not needed here.
Ingress resource without a Service
Why it's wrong here
Ingress requires a backend Service to route traffic to pods.
Service of type ClusterIP
Why it's wrong here
ClusterIP is only accessible inside the cluster.
Service of type LoadBalancer
Why this is correct
LoadBalancer exposes the service externally and provides load balancing.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse 'exposing to external clients' with internal-only services, leading them to pick ClusterIP (C) or assume Ingress (B) can work without a Service, while the question explicitly requires load balancing for stateless pods, making LoadBalancer the direct and correct answer.
Detailed technical explanation
Under the hood, a LoadBalancer Service triggers the cloud provider's controller to create an external load balancer (e.g., AWS Network Load Balancer) that forwards traffic to the Service's ClusterIP on each node via kube-proxy and iptables/IPVS rules. A subtle behavior is that the external load balancer's health checks target the node's NodePort, not the pod directly, which can cause uneven traffic distribution if pods are not evenly spread across nodes. In real-world scenarios, this matters for cost optimization, as each LoadBalancer Service incurs cloud provider charges, so consolidating multiple APIs behind a single Ingress controller is often preferred.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the KCNA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: Service of type LoadBalancer — A Service of type LoadBalancer is the correct choice because it provisions an external load balancer (e.g., an AWS ELB or Azure LB) that distributes incoming traffic across the pods, exposing the stateless HTTP API to external clients. This resource automatically assigns a public IP and handles load balancing without requiring manual proxy configuration, making it ideal for external access to stateless workloads.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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.
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