Which command is used to scale the number of Deployment replicas?

Which command is used to scale the number of Deployment replicas?

• A. kubectl apply
• B. kubectl set image
• C. kubectl patch
• D. kubectl scale

Answer: (D)

Scaling the number of Deployment replicas means changing how many pod instances Kubernetes should run for that Deployment. The command designed for this task is kubectl scale, which updates the replicas field directly (for example: kubectl scale deployment my-app --replicas=5). Once you set a new replica count, the Kubernetes controllers will create or terminate pods to reach the desired number. Other commands serve different purposes: apply brings in a manifest to create or update resources, set image changes container images, and patch makes targeted edits to a resource; none are as direct and explicit for adjusting the replica count as scale.

Scaling the number of Deployment replicas means changing how many pod instances Kubernetes should run for that Deployment. The command designed for this task is kubectl scale, which updates the replicas field directly (for example: kubectl scale deployment my-app --replicas=5). Once you set a new replica count, the Kubernetes controllers will create or terminate pods to reach the desired number. Other commands serve different purposes: apply brings in a manifest to create or update resources, set image changes container images, and patch makes targeted edits to a resource; none are as direct and explicit for adjusting the replica count as scale.