KCNA Storage Solutions 5

Question 1

In a cloud-native architecture, which pattern best describes using object storage (like S3) instead of block storage for application data?

Accepted Answer

Externalizing state to a managed object store accessed via SDK or API

Answer

Cloud-native design favors externalized object storage accessed via API/SDK over block storage mounted in pods, enabling better scalability and decoupling.

Question 2

What is the role of the 'node-driver-registrar' CSI sidecar?

Accepted Answer

It registers the CSI driver with the kubelet on each node using the kubelet plugin registration mechanism

Answer

The node-driver-registrar sidecar uses the kubelet plugin registration API to make the kubelet aware of the CSI driver on a given node.

Question 3

Which of the following volume types is most appropriate for sharing temporary data between containers in the same pod?

Accepted Answer

emptyDir

Answer

emptyDir volumes are created when a pod starts and are shared among all containers in that pod, making them ideal for inter-container scratch space.

Question 4

A storage administrator wants a PV to only be bound to a specific PVC before it is created. Which mechanism achieves this?

Accepted Answer

Pre-populating the claimRef field on the PV with the target PVC details

Answer

Pre-setting the claimRef on a PV with the namespace and name of the intended PVC ensures only that PVC can bind to it during static provisioning.

Question 5

Which Kubernetes feature allows administrators to define storage capacity constraints per topology zone so the scheduler can make better pod placement decisions?

Accepted Answer

StorageCapacity API (CSIStorageCapacity objects)

Answer

CSIStorageCapacity objects let CSI drivers report available storage capacity per topology zone, enabling the Kubernetes scheduler to factor storage availability into pod placement.

(KCNA) Kubernetes and Cloud Native Associate Practice Test

(KCNA) Kubernetes and Cloud Native Associate Practice Test

KCNA Storage Solutions 5