Docker Images vs Containers — Interview sheet

A print-ready, 2-page A4 interview cheat sheet distilled from my Docker video.

Front: what an image really is (frozen read-only snapshot), what a container really is (a process wearing blinders via kernel namespaces), container vs VM with the scoreboard numbers interviewers expect — 3 s vs 3 min boot, 140 MB vs 4 GB — and why containers being disposable changes how you use them.

Back: the 6 Docker questions every backend/DevOps interview asks — image vs container, container vs VM, how Docker kills "works on my machine", two Postgres versions on one host, why disposable matters, and what actually happens on docker run postgres — complete answers, plus 3 traps ("a container is a lightweight VM" and friends).

For backend / DevOps / platform interview prep. Instant download.