Match each Kubernetes scheduler concept to its description.
Drag a concept onto its matching description — or click a concept then click the description.
Constraints that attract pods to nodes based on node labels
Mechanism to repel pods from nodes unless they tolerate the taint
Minimum amount of CPU/memory guaranteed to a container
Maximum amount of CPU/memory a container can use
Indicates importance of a pod relative to others for preemption
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
NodeAffinity: Constraints on which nodes a pod can be scheduled based on node labels.
NodeAffinity and NodeSelector both use node labels but differ in expressiveness. PodAffinity schedules relative to other pods. Taints/Tolerations control which pods can be placed on nodes. Common confusion: swapping NodeAffinity with PodAffinity or Taints/Tolerations.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
NodeAffinity: Constraints on which nodes a pod can be scheduled based on node labels.
Why this is correct
NodeAffinity allows rules to target specific nodes by their labels, more expressive than NodeSelector.
PodAffinity: Constraints on scheduling pods relative to other pods based on pod labels.
Why this is correct
PodAffinity enables co-location or separation of pods based on their labels.
Taints and Tolerations: Mechanism to repel pods from nodes unless they tolerate the taint.
Why this is correct
Taints mark nodes to repel pods, tolerations allow pods to be scheduled on tainted nodes.
NodeSelector: Simple label-based constraint to restrict pod to nodes with specific labels.
Why this is correct
NodeSelector is a basic scheduling constraint matching node labels.
NodeAffinity: Ensures pods are scheduled together with other pods on the same node.
Why it's wrong here
Incorrect — this describes PodAffinity, not NodeAffinity.
PodAffinity: Repels pods from nodes unless they have a specific label.
Why it's wrong here
Incorrect — this describes Taints and Tolerations, not PodAffinity.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.