Scheduler KCSA Practice Questions (Page 1)

Questions 1–5

1. 1expert · hard

   A company runs a Kubernetes cluster with nodes in two availability zones. They want to ensure that pods for a critical application are spread across both zones for high availability, but they also want to minimize cross-zone traffic. What is the best scheduling configuration?

   • AUse pod anti-affinity with requiredDuringSchedulingIgnoredDuringExecution to spread pods across zones.
   • BUse node affinity to place pods on nodes in both zones.
   • CUse topology spread constraints with topologyKey 'topology.kubernetes.io/zone' and maxSkew=1.
   • DUse taints and tolerations to allow pods on both zones.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Why is it important to secure the Kubernetes scheduler's API access?

   • ABecause a compromised scheduler could manipulate pod placement to run workloads on unauthorized nodes
   • BBecause the scheduler stores all cluster secrets and credentials
   • CBecause the scheduler directly manages container runtimes on all nodes
   • DBecause the scheduler is the only component that can authenticate to the API server
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   Which Kubernetes component is responsible for ensuring that a pod is placed on a node that satisfies the pod's resource requests?

   • Akube-scheduler
   • Bkube-controller-manager
   • Ckube-proxy
   • Dkubelet
   Reveal Solution Discussion Select an answer first
5. 4expert · hard

   A company runs a multi-tenant cluster with two teams: Team A runs critical production services, and Team B runs non-critical batch jobs. During resource contention, the scheduler is evicting Team A's pods to make room for Team B's pods. The company wants to prevent this. What is the most effective solution?

   • ATaint the nodes used by Team A and add tolerations only to Team A's pods.
   • BUse resource quotas to limit Team B's namespace to a small amount of CPU and memory.
   • CAssign a higher PriorityClass to Team A's pods and a lower one to Team B's pods.
   • DSet pod disruption budgets for Team A's pods to prevent eviction.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A pod has a required node affinity rule and a preferred node affinity rule. The required rule matches only one node, but that node is currently out of resources. What will the scheduler do?

   • ASchedule the pod on the node that matches the preferred rule.
   • BSchedule the pod on any node that matches the preferred rule and ignore the required rule.
   • CLeave the pod Pending until the required node has resources.
   • DEvict other pods from the required node to free resources.
   Reveal Solution Discussion Select an answer first