A cluster has dedicated nodes for a critical database. These nodes are tainted with `db=critical:NoSchedule`. A database Pod is deployed with a toleration for this taint. However, the Pod is not being scheduled; it remains Pending. The scheduler logs show that the Pod is being rejected due to insufficient resources on the tainted nodes. What is the most likely cause?

The Pod needs a nodeSelector to match the tainted nodes.

The taint effect should be `NoExecute` instead of `NoSchedule`.

The Pod's resource requests are higher than the allocatable resources on the tainted nodes.

The toleration is not correctly formatted; it should use `operator: Exists` without a value.

A workload must run on nodes that are part of a specific availability zone, `zone-a`. The nodes are labeled `topology.kubernetes.io/zone=zone-a`. The administrator wants to ensure the Pod is scheduled only on those nodes. Which configuration should be used?

A toleration for a taint on zone-a nodes

nodeAffinity with preferredDuringSchedulingIgnoredDuringExecution matching `topology.kubernetes.io/zone In (zone-a)`

nodeSelector with `topology.kubernetes.io/zone: zone-a`

podAffinity with requiredDuringSchedulingIgnoredDuringExecution matching a Pod label in zone-a

A namespace has a LimitRange that sets `max.cpu: 2` and `default.cpu: 500m`. A developer creates a Pod with a container that specifies `resources.limits.cpu: 3`. What happens when the Pod is created?

The Pod is accepted, and the default limit of 500m is applied.

The Pod is rejected because the limit exceeds the maximum allowed by the LimitRange.

The Pod is accepted, and the limit is adjusted to 2.

The Pod is accepted, and the limit is set to 2, but the request is set to 500m.

Certified Kubernetes Administrator (CKA)

Domain 3Objective 5

Configure Pod Admission and Scheduling (limits, Node Affinity, Etc.) CKA Practice Questions (Page 5)

Part of the Workloads and Scheduling domain, which accounts for 15% of the CKA exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 2–2 from this objective — we provide 29 practice questions to prepare you well beyond it. (estimate)

29questions here

6free pages

10concepts

15%of the exam

Questions 21–25

21application · medium
A cluster has dedicated nodes for a critical database. These nodes are tainted with `db=critical:NoSchedule`. A database Pod is deployed with a toleration for this taint. However, the Pod is not being scheduled; it remains Pending. The scheduler logs show that the Pod is being rejected due to insufficient resources on the tainted nodes. What is the most likely cause?
Select an answer first
22foundation · easy
Which component is responsible for selecting a node for a Pod in Kubernetes?
Select an answer first
23application · easy
A workload must run on nodes that are part of a specific availability zone, `zone-a`. The nodes are labeled `topology.kubernetes.io/zone=zone-a`. The administrator wants to ensure the Pod is scheduled only on those nodes. Which configuration should be used?
Select an answer first
24application · medium
A namespace has a LimitRange that sets a default CPU request of 250m and a default CPU limit of 500m. A developer creates a Pod with a container that specifies only `resources.limits.cpu: 1`. What will be the effective CPU request and limit for the container?
Select an answer first
25expert · medium
A namespace has a LimitRange that sets `max.cpu: 2` and `default.cpu: 500m`. A developer creates a Pod with a container that specifies `resources.limits.cpu: 3`. What happens when the Pod is created?
Select an answer first

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Configure Pod Admission and Scheduling (limits, Node Affinity, Etc.) CKA Practice Questions (Page 5)

Questions 21–25

Which component is responsible for selecting a node for a Pod in Kubernetes?

A workload must run on nodes that are part of a specific availability zone, `zone-a`. The nodes are labeled `topology.kubernetes.io/zone=zone-a`. The administrator wants to ensure the Pod is scheduled only on those nodes. Which configuration should be used?

A namespace has a LimitRange that sets a default CPU request of 250m and a default CPU limit of 500m. A developer creates a Pod with a container that specifies only `resources.limits.cpu: 1`. What will be the effective CPU request and limit for the container?

A namespace has a LimitRange that sets `max.cpu: 2` and `default.cpu: 500m`. A developer creates a Pod with a container that specifies `resources.limits.cpu: 3`. What happens when the Pod is created?

Keep studying — Workloads and Scheduling