Which statement best describes Kubernetes replicas in the context of Self Healing?

Which statement best describes Kubernetes replicas in the context of Self Healing?

• A. To truncate logs for storage efficiency
• B. Replicas are used to ensure a given number of instances of a deployment are running, and to replace any that fail, thereby providing self-healing functionality
• C. To store persistent data in a distributed volume
• D. To assign resource quotas to namespaces

Answer: (B)

Replicas control how many pod instances should be running for a workload. A Deployment declares a desired replica count and uses a ReplicaSet to enforce it. Kubernetes continuously reconciles the actual state with the desired state; if any pod dies, becomes unhealthy, or a node goes down, the control plane automatically creates new pods to bring the count back to the specified number. This automatic repair is self-healing: the system detects failures and heals by replacing the failed components without manual intervention. Other options don’t fit this concept: truncating logs is about log management, storing persistent data concerns volumes, and resource quotas govern limits rather than automatic recovery.

Replicas control how many pod instances should be running for a workload. A Deployment declares a desired replica count and uses a ReplicaSet to enforce it. Kubernetes continuously reconciles the actual state with the desired state; if any pod dies, becomes unhealthy, or a node goes down, the control plane automatically creates new pods to bring the count back to the specified number. This automatic repair is self-healing: the system detects failures and heals by replacing the failed components without manual intervention. Other options don’t fit this concept: truncating logs is about log management, storing persistent data concerns volumes, and resource quotas govern limits rather than automatic recovery.