This CKA practice question tests your understanding of cluster architecture, installation and configuration. 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 commands are valid for managing nodes in Kubernetes? (Select two.)
kubectl drain <node>
Drains pods from a node for maintenance.
kubectl delete node <node>
Why wrong: Deletes the node object, not a management command for scheduling.
kubectl cordon <node>
Correct command to mark node unschedulable.
kubectl taint <node>
Why wrong: Taints are used for pod scheduling constraints, not node management per se.
kubectl scale node <node>
Why wrong: No such command.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
kubectl drain <node>
`kubectl drain <node>` is valid because it safely evicts all pods from a node, marking it unschedulable and preparing it for maintenance. `kubectl cordon <node>` is valid because it marks a node as unschedulable, preventing new pods from being scheduled onto it while existing pods continue running.
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.
kubectl drain <node>
Why this is correct
Drains pods from a node for maintenance.
Related concept
Read the scenario before looking for a memorised answer.
kubectl delete node <node>
Why it's wrong here
Deletes the node object, not a management command for scheduling.
kubectl cordon <node>
Why this is correct
Correct command to mark node unschedulable.
Related concept
Read the scenario before looking for a memorised answer.
kubectl taint <node>
Why it's wrong here
Taints are used for pod scheduling constraints, not node management per se.
kubectl scale node <node>
Why it's wrong here
No such command.
Common exam traps
The trap here is that candidates may confuse `kubectl delete node` with a valid maintenance command, but it only removes the node object from etcd and does not affect the actual kubelet or running pods, making it unsuitable for safe node management.
Trap categories for this question
Command / output trap
Deletes the node object, not a management command for scheduling.
Detailed technical explanation
`kubectl drain` performs a sequence of operations: it cordons the node, then evicts pods respecting PodDisruptionBudgets (PDBs) and graceful termination periods, and can force eviction with `--force` if needed. `kubectl cordon` sets the `spec.unschedulable` field to true on the Node object, which the kube-scheduler checks via the node's taints and conditions before placing pods. Understanding the difference between cordon (no new pods) and drain (evict existing pods) is critical for cluster maintenance scenarios.
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 CKA 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
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FAQ
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
The correct answer is: kubectl drain <node> — `kubectl drain <node>` is valid because it safely evicts all pods from a node, marking it unschedulable and preparing it for maintenance. `kubectl cordon <node>` is valid because it marks a node as unschedulable, preventing new pods from being scheduled onto it while existing pods continue running.
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 24, 2026
This CKA 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 CKA exam.
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