CKAD Storage and Persistence 3

Question 1

What is the purpose of a volumeMount entry in a container spec?

Accepted Answer

To specify the path inside the container where the volume will be accessible

Answer

To declare which PVC the Pod uses

Answer

To set read/write permissions on the PV

Answer

To define the size of the volume for the container

Question 2

How can you create an emptyDir volume backed by node RAM instead of disk?

Accepted Answer

Set emptyDir.medium: Memory

Answer

Set emptyDir.type: Memory

Answer

Set emptyDir.storage: tmpfs

Answer

Set emptyDir.backend: ram

Question 3

What does setting storageClassName: "" (empty string) in a PVC spec do?

Accepted Answer

Disables dynamic provisioning and only allows binding to pre-provisioned PVs with no StorageClass

Answer

Uses the cluster's default StorageClass

Answer

Creates a new empty StorageClass automatically

Answer

Makes the PVC use any available StorageClass

Question 4

What prerequisite must a StorageClass satisfy before a PVC can be expanded after creation?

Accepted Answer

The StorageClass must have allowVolumeExpansion: true

Answer

The StorageClass must have reclaimPolicy: Retain

Answer

The StorageClass must use a cloud-native provisioner

Answer

The StorageClass must set volumeBindingMode: WaitForFirstConsumer

Question 5

What is the purpose of volumeClaimTemplates in a StatefulSet?

Accepted Answer

To automatically create a unique PVC for each pod replica in the StatefulSet

Answer

To share a single PVC among all pods in the StatefulSet

Answer

To define a template for manually creating PVCs via kubectl

Answer

To set backup schedules for StatefulSet volumes

Question 6

Which access mode allows a PersistentVolume to be mounted as read-only by multiple nodes simultaneously?

Accepted Answer

ReadOnlyMany (ROX)

Answer

ReadWriteOnce (RWO)

Answer

ReadWriteMany (RWX)

Answer

ReadWriteOncePod (RWOP)

Question 7

Which kubectl command displays the capacity, access modes, reclaim policy, and status of all PersistentVolumes in the cluster?

Accepted Answer

kubectl get pv

Answer

kubectl describe pvc

Answer

kubectl status pv

Answer

kubectl inspect pv