Certified Kubernetes Administrator (CKA) Practice Test

The primary function of Pod Disruption Budgets (PDBs) in Kubernetes is indeed to manage voluntary disruptions. PDBs allow administrators to specify the minimum number of pods that must be available at any given time during voluntary disruptions, such as during node maintenance or deployments. This ensures that a certain level of service is maintained even when some pods are being updated or taken down for maintenance. By defining a budget, you can control how many pods can be unavailable simultaneously, thus protecting the application from over-disruption and ensuring high availability.

By focusing on managing voluntary disruptions, PDBs contribute significantly to the stability and reliability of applications running in a Kubernetes cluster, allowing users to make changes without causing an outage or affecting user experience adversely. Other choices do not align with the core purpose of PDBs; for example, increasing pod replication or enforcing security policies do not concern managing disruptions, and while resource allocation is important, it is not the focus of a Pod Disruption Budget.