KCNA Pod Management & Scheduling 5

Question 1

Which scheduler priority mechanism allows critical system pods to preempt lower-priority pods when resources are scarce?

Accepted Answer

PriorityClass

Answer

A PriorityClass assigns a numeric priority to pods; higher-priority pods can preempt (evict) lower-priority pods to get scheduled.

Question 2

What does `kubectl rollout restart deployment/myapp` do?

Accepted Answer

Triggers a rolling restart of all pods in the Deployment without changing the spec

Answer

`rollout restart` updates a pod template annotation to trigger a rolling update, cycling all pods while maintaining availability.

Question 3

Which Pod volume type mounts a directory from the host node's filesystem directly into the pod?

Accepted Answer

hostPath

Answer

A `hostPath` volume mounts a specific path from the underlying node into the pod, giving direct access to host files.

Question 4

A container's `resources.requests` value affects scheduling how?

Accepted Answer

The scheduler only places the pod on nodes with at least that much allocatable resource available

Answer

Requests are what the scheduler uses to fit pods onto nodes; a node must have sufficient allocatable capacity to satisfy the pod's requests.

Question 5

Which field allows you to configure the scheduler to wait before evicting a pod that fails its `NoExecute` taint toleration?

Accepted Answer

tolerationSeconds in the toleration spec

Answer

`tolerationSeconds` on a `NoExecute` toleration sets how long the pod can remain on a tainted node before being evicted.

(KCNA) Kubernetes and Cloud Native Associate Practice Test