What is a group of one or more containers in a Kubernetes cluster?

• A. Pod
• B. Deployment
• C. Service
• D. Namespace

Answer: (A)

In Kubernetes, the basic unit that is scheduled and managed is a Pod. A Pod represents a group of one or more containers that run together on the same node, sharing the same IP address, port space, and storage volumes. This close co-location allows containers inside the pod to communicate efficiently and to coordinate as a single unit, which is exactly what a group of one or more containers is intended to be.

A Deployment belongs to the next level up: it manages the lifecycle and rollout of Pods, ensuring the desired number of replicas and handling updates. A Service provides a stable network endpoint to access a set of pods, abstracting away the actual Pod IPs. A Namespace is a way to partition cluster resources for isolation and organization, not a container grouping mechanism.