How many replicas does a Deployment create by default?

Correct answer: 1

Option A is correct because when a Kubernetes Deployment is created without specifying a replica count, the default value is 1, meaning exactly one Pod will be created and maintained. Option B is incorrect because 5 replicas is not the default; it would need to be explicitly set in the Deployment manifest. Option C is incorrect because 0 replicas would result in no running Pods, which would not be a useful or valid default for a Deployment intended to run an application. Option D is incorrect because 3 is a common recommended value for high availability but is not the default; it must be explicitly configured.