- A
etcd
Why wrong: etcd stores cluster state but does not schedule pods.
- B
kube-apiserver
Why wrong: The API server exposes the Kubernetes API and processes requests, but does not assign pods to nodes.
- C
kube-scheduler
The kube-scheduler watches for newly created pods and assigns them to nodes.
- D
kube-controller-manager
Why wrong: The controller manager runs controllers that perform reconciliation, but scheduling is done by the scheduler.
Question 240 of 997
kube-scheduler: The Control Plane Component Responsible for Pod Node Assignment
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 control plane component is responsible for assigning pods to nodes?
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
✓
kube-scheduler
The kube-scheduler is the control plane component responsible for assigning pods to nodes. It watches for newly created pods that have no node assignment and selects an optimal node for each pod based on resource requirements, constraints, policies, and data locality. The scheduler does not actually run the pod; it updates the pod's `nodeName` field via the API server, which then triggers the kubelet on the chosen node to launch the pod.
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.
- ✗
etcd
Why it's wrong here
etcd stores cluster state but does not schedule pods.
- ✗
kube-apiserver
Why it's wrong here
The API server exposes the Kubernetes API and processes requests, but does not assign pods to nodes.
- ✓
kube-scheduler
Why this is correct
The kube-scheduler watches for newly created pods and assigns them to nodes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
kube-controller-manager
Why it's wrong here
The controller manager runs controllers that perform reconciliation, but scheduling is done by the scheduler.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common misconception is that kube-apiserver handles scheduling because it is the central API gateway, but the scheduler is a distinct component that runs the scheduling algorithm and communicates with the API server to bind pods to nodes.
Detailed technical explanation
How to think about this question
The kube-scheduler uses a two-phase algorithm: filtering (predicates) to find feasible nodes and scoring (priorities) to rank them. It evaluates constraints such as node affinity, taints and tolerations, resource requests and limits, and pod topology spread constraints. In real-world scenarios, you can define custom schedulers or use scheduler profiles to handle specialized workloads, such as GPU-intensive pods that must land on nodes with specific hardware.
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 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Kubernetes Fundamentals — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this KCNA question test?
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: kube-scheduler — The kube-scheduler is the control plane component responsible for assigning pods to nodes. It watches for newly created pods that have no node assignment and selects an optimal node for each pod based on resource requirements, constraints, policies, and data locality. The scheduler does not actually run the pod; it updates the pod's `nodeName` field via the API server, which then triggers the kubelet on the chosen node to launch the pod.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jul 4, 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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