How are the container specifications in Deployments and StatefulSets similar in Kubernetes?

How are the container specifications in Deployments and StatefulSets similar in Kubernetes?

• A. They use different container specs
• B. Both Deployments and StatefulSets use the same container spec within their pod templates
• C. StatefulSets only use init containers
• D. Deployments do not support sidecars

Answer: (B)

In Kubernetes, the container specifications inside the pod template are identical for Deployments and StatefulSets. Both controllers define the pod template using the standard PodSpec, so you specify containers in the same way—including image, ports, environment variables, resources, probes, volume mounts, and any init containers. The difference between these controllers lies in how they manage the pods (stateless versus stateful characteristics, update strategies, and storage/identity features), not in the container spec format itself.

In Kubernetes, the container specifications inside the pod template are identical for Deployments and StatefulSets. Both controllers define the pod template using the standard PodSpec, so you specify containers in the same way—including image, ports, environment variables, resources, probes, volume mounts, and any init containers. The difference between these controllers lies in how they manage the pods (stateless versus stateful characteristics, update strategies, and storage/identity features), not in the container spec format itself.