Which object controls the number of pod replicas for an application in OpenShift?

• A. Service
• B. ConfigMap
• C. Deployment
• D. Route

Answer: (C)

In OpenShift, the Deployment is what controls how many pods run for an application. It defines the desired number of replicas in its spec.replicas, and the controller makes sure that exact number of pod instances are running by creating or terminating pods as needed. You can adjust this count to scale the app either by changing the replicas value (for example, via a CLI command or by editing the deployment) or by using autoscaling, but the Deployment is the resource that enforces the replica count. By contrast, a Service handles networking to pods, a Route exposes the service outside the cluster, and a ConfigMap stores configuration data—none of these directly set the number of pod replicas.