Interview Q&A / Docker & Kubernetes
Docker & Kubernetes interview questions
Images, containers, Dockerfiles, pods and deployments, from first principles.
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- What is the difference between a container and a virtual machine?
A virtual machine runs a full guest operating system on virtual hardware provided by a hypervisor. A container is just an isolated process that shares the host's kernel, so it starts in seconds or less, uses far less memory, and is lighter to ship, but gives weaker isolation than a VM.
BeginnerIn-depth4 min read - What is the difference between a Docker image and a container?
An image is a read-only template that holds your app, its dependencies and a startup command. A container is a running (or stopped) instance of that image, with its own thin writable layer on top. One image can start many containers.
BeginnerIn-depth3 min read