Certified Kubernetes Application Developer (CKAD) Practice Test

What type of storage request might you specify in a PersistentVolumeClaim?

1. Provision storage using a random access pattern

2. Request a specific storage capacity

3. Define a timeout for the storage request

4. Specify replication factors for the volume

The correct answer is: Request a specific storage capacity

The correct answer is that you can request a specific storage capacity in a PersistentVolumeClaim (PVC). A PVC is a request for storage that specifies the size of the desired storage, which allows Kubernetes to dynamically provision a PersistentVolume (PV) that meets this requirement. When creating a PVC, users can specify the amount of storage they need, and Kubernetes will ensure that a matching PV is available or provisions a new one if necessary. This is fundamental in cloud-native environments, where applications often require a defined amount of storage to function correctly. The other options highlight aspects that are not applicable to PersistentVolumeClaims. For instance, while storage provided can support random access patterns, this is more about the characteristics of the underlying storage system rather than a request option within a PVC. Defining a timeout for a storage request is also not a feature associated with a PVC; the provisioning and binding of storage typically do not involve setting timeouts. Furthermore, specifying replication factors for a volume is more about the characteristics of the storage backend and its management rather than a direct request made through a PVC. These elements are generally abstracted away from the user who simply needs to specify their storage capacity requirements.