What is Docker? What is the difference between a container and a virtual machine?

Docker packages applications and dependencies into containers — lightweight, isolated process groups. VMs virtualize hardware; containers share the host OS kernel, making them faster to start and more resource-efficient.

What is a CI/CD pipeline? Describe the stages.

CI (Continuous Integration) automatically builds and tests code on every push. CD (Continuous Deployment) automatically deploys passing builds. A typical pipeline: code push → lint → build → unit tests → integration tests → staging deploy → production deploy.

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DevOps & Docker

15 Questions

Containerization, CI/CD pipelines, Kubernetes basics, infrastructure as code, cloud services, and deployment strategies.

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