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Docker & Kubernetes: Basic To Advanced Interview Questions!
Have you ever been in a tech interview where you’re asked about Docker or Kubernetes, and the questions feel like a test of your patience rather than your skills?
Let’s break down basic to advanced , commonly asked questions about containerization and orchestration – with real-world insights to make it stick.
📍What is Docker, and how does it work?
Docker is a containerization platform that packages applications and dependencies together in lightweight, portable containers. Think of containers as “mini-VMs” without the overhead – perfect for consistent environments across dev, test, and production.
🔹How it works: Docker uses a client-server architecture. The Docker engine creates containers using images (templates) built with Dockerfiles. It ensures that “it works on my machine” translates to every environment.
📍How do containers differ from virtual machines?
🔹VMs: Heavy, run entire operating systems, and require a hypervisor.
🔹Containers: Lightweight, share the host OS kernel, and are much faster to start/stop.
Real-life analogy: If a VM is a fully furnished house, a container is like renting a single room with shared utilities.
📍Explain the concept of Docker Compose.
Docker Compose is like your orchestra conductor for multi-container apps. You define your app’s services…