How to use the Docker MCQ Quiz
- 1. AnswerChoose one option for each of the 15 questions.
- 2. CheckSee your score and the correct answer for every question.
- 3. UnderstandRead the explanation and try the command yourself.
Concepts covered
Questions start with the core difference between an image and a container and what a Dockerfile is. They go on to what -p 8080:80 maps, why copying package files before the rest of the code speeds up builds, how named volumes keep database data, and how containers on a user-defined network reach each other by name. Later questions cover multi-stage builds, .dockerignore, EXPOSE, docker system prune, passing secrets at run time and running as a non-root user.
Answer them all correctly and the result reads 15 / 15, scored in your browser.
From quiz to hands-on
Docker ideas stick once you see them. For any question you miss, try a small experiment:
- Build an image twice and watch which steps say CACHED.
- Run Postgres without a volume, add data, remove the container, and see the data vanish; then repeat with a volume.
- Start two containers on one network and ping one from the other by name.
- Compare the size of a single-stage and a multi-stage image with docker images.
Each experiment takes a few minutes and shows the idea far better than a definition does. The Docker commands cheat sheet has every command you need for these, and the Dockerfile generator gives you a multi-stage file to compare against.
Frequently asked questions
Do I need Docker installed to take the quiz?
No. The quiz runs in the browser. You will want Docker Desktop or Docker Engine to practise afterwards.
Are these questions from a certification?
No. They are original questions on core Docker concepts used in interviews and on the job.
Is the Docker MCQ Quiz free?
Yes, the Docker MCQ Quiz is free. The first time you check your first score, you are asked for your name and WhatsApp number once. After that, this and every other Uncodemy tool opens straight away without the form.