CKA CKA Storage and Volumes

Question 1

Which Kubernetes object represents a piece of storage provisioned by an administrator in the cluster?

Accepted Answer

PersistentVolume

Answer

A PersistentVolume (PV) is a cluster-level storage resource provisioned by an admin or dynamically via a StorageClass.

Question 2

What does a PersistentVolumeClaim (PVC) do in Kubernetes?

Accepted Answer

Requests a specific amount and type of storage from the cluster

Answer

A PVC is a user's request for storage, specifying size and access mode, which the cluster fulfills by binding to a matching PV.

Question 3

Which access mode allows a PersistentVolume to be mounted as read-write by a single node?

Accepted Answer

ReadWriteOnce

Answer

ReadWriteOnce (RWO) allows the volume to be mounted as read-write by exactly one node at a time.

Question 4

What happens to a PersistentVolume when its reclaim policy is set to 'Retain' and the PVC is deleted?

Accepted Answer

The PV remains and must be manually reclaimed by an admin

Answer

With the Retain policy, the PV is not deleted and holds the data until an administrator manually reclaims or deletes it.

Question 5

Which field in a PVC spec specifies the minimum storage size required?

Accepted Answer

resources.requests.storage

Answer

The `resources.requests.storage` field in a PVC spec indicates the amount of storage the claim is requesting.

(CKA) Certified Kubernetes Associate Practice Test