Why containers matter 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'

Abuild

Brun

Cstart

Dps

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using 'build' which is for images

The docker ps command lists all running containers.

2fill in blank

medium

Complete the command to create and start a container from the image named 'nginx'.

Docker

docker [1] nginx

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

Abuild

Bstop

Crun

Dpull

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'build' which creates images

Using 'pull' which downloads images

The docker run command creates and starts a container from an image.

3fill in blank

hard

Fix the error in the command to stop a container with ID 'abc123'.

Docker

docker [1] abc123

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

Astop

Brm

Cstart

Dexec

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' which starts containers

Using 'rm' which removes containers

The docker stop command stops a running container.

4fill in blank

hard

Fill both blanks to create a container named 'webserver' from the 'nginx' image and run it in detached mode.

Docker

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

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

Arun

Bbuild

Cwebserver

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'build' instead of 'run'

Using 'start' without creating the container first

Use docker run --name webserver -d nginx to start a container named 'webserver' in detached mode.

5fill in blank

hard

Fill all three blanks to remove a stopped container named 'old_container'.

Docker

docker [1] [2] [3]

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

Arm

B-f

Cold_container

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'stop' instead of 'rm'

Omitting the container name

The command docker rm old_container removes the container named 'old_container'. Use '-f' to force removal if the container is running.