Academy Docker Quiz
Questions covering the core concepts, tools, and real-world scenarios IT professionals encounter in Academy Docker.
This category currently has 60 questions in the SERVBG quiz bank. Below are a few sample questions — the full interactive quiz shuffles through the whole set with instant scoring.
Sample questions
What is a Docker image made up of, structurally?
- A text file listing package names to install at runtime
- A single compressed archive with no internal structure
- A stack of read-only, content-addressed filesystem layers plus metadata
- A live filesystem snapshot taken from a running container
- A virtual machine disk image with a full kernel
Which command downloads an image from a registry without running it?
- docker fetch <image>
- docker get <image>
- docker install <image>
- docker download <image>
- docker pull <image>
If you run `docker pull redis` with no tag specified, which tag does Docker use?
- default
- main
- current
- stable
- latest
What does `docker images` list?
- The images currently stored on the local machine
- Every image ever published to Docker Hub
- Only images that are currently running as containers
- Remote images available in a configured registry
- The Dockerfiles present in the working directory
In `docker pull postgres:15`, what does the `15` after the colon specify?
- The port the container will listen on
- The number of build steps in the Dockerfile
- The number of layers in the image
- The tag, identifying a specific image version
- The size limit of the image in megabytes
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