What is the difference between Docker Containerization and Kubernetes Container Orchestration?

Quick Revision Summary

Docker packages applications into standardized containers; Kubernetes coordinates, scales, and self-heals hundreds of containers across distributed server clusters.

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Model Answer & Deep-Dive Explanation

Docker is a platform and runtime for creating, packaging, and running applications inside isolated lightweight containers that share the host OS kernel.

Kubernetes (K8s) is an open-source container orchestration platform that automates deployment, scaling, healing, and management of containerized applications across a cluster of multiple host machines.

Dimension	Docker (Standalone)	Kubernetes
Scope	Single container lifecycle on one host	Fleet orchestration across multiple nodes
Auto-scaling	Manual or basic scripts	Horizontal Pod Autoscaler (HPA) based on CPU/RAM/metrics
Self-healing	Restarts failed container locally	Replaces dead nodes, reschedules pods across healthy nodes
Networking	Bridge, Host, Overlay drivers	Cluster-wide CNI, Ingress Controllers, Service mesh

Interviewer Evaluation Points & Scoring Rubric

1 1. Clearly articulates container runtime vs orchestration platform. 2. Mentions self-healing, rolling deployments, and auto-scaling. 3. Shows understanding of K8s primitives (Pods, Deployments, Services).

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What is the difference between Docker Containerization and Kubernetes Container Orchestration?

Interviewer Evaluation Points & Scoring Rubric

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