Why container security matters in Docker - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the command to list all running Docker containers.

Docker

docker [1]

Drag options to blanks, or click blank then click option'

Arun

Bimages

Cbuild

Dps

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker run' instead of 'docker ps' to list containers.

Using 'docker images' which lists images, not containers.

The docker ps command shows all running containers.

2fill in blank

medium

Complete the command to remove a Docker container by its ID.

Docker

docker [1] container_id

Drag options to blanks, or click blank then click option'

Arm

Bstop

Crun

Dexec

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker stop' which only stops but does not remove containers.

Using 'docker exec' which runs commands inside containers.

The docker rm command removes a container by its ID.

3fill in blank

hard

Fix the error in the command to build a Docker image from a Dockerfile.

Docker

docker build -t [1] .

Drag options to blanks, or click blank then click option'

Amy_image

B-f

Crun

Dcontainer

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-f' after '-t' which is incorrect here.

Using 'run' or 'container' which are not valid image names.

The -t option tags the image with a name like my_image.

4fill in blank

hard

Fill both blanks to create a Docker container with a specific name and run it in detached mode.

Docker

docker run -d --name [1] [2]

Drag options to blanks, or click blank then click option'

Amy_container

Bnginx

C-p 80:80

Dubuntu

Attempts:

3 left

💡 Hint

Common Mistakes

Putting image name in the container name blank.

Using port mapping instead of image name.

my_container is the container name, and nginx is the image to run.

5fill in blank

hard

Fill all three blanks to write a Dockerfile snippet that sets the base image, copies files, and runs a command.

Docker

FROM [1]
COPY . /app
CMD ["[2]", "[3]"]

Drag options to blanks, or click blank then click option'

Apython:3.12-slim

Bpython

Capp.py

Dnginx

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'nginx' as base image for a Python app.

Swapping command and script names.

The base image is python:3.12-slim, the command is python, and the script to run is app.py.