Why Docker improves development workflow - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a Docker container using the official nginx image.

Docker

docker run --name mynginx [1]

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

Anginx

Bubuntu

Cmysql

Dnode

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated images like ubuntu or mysql.

The nginx image is used to run an nginx web server container.

2fill in blank

medium

Complete the command to list all running Docker containers.

Docker

docker [1]

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

Aps

Brun

Cbuild

Dimages

Attempts:

3 left

💡 Hint

Common Mistakes

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

docker ps shows all running containers.

3fill in blank

hard

Fix the error in the Dockerfile to copy files into the container.

Docker

FROM alpine
COPY [1] /app/

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

A/app

Bapp/

Capp

D./app

Attempts:

3 left

💡 Hint

Common Mistakes

Adding a trailing slash to the source path.

The source path should be relative without trailing slash to copy the folder correctly.

4fill in blank

hard

Fill both blanks to run a container in detached mode and map port 8080 to 80.

Docker

docker run [1] -p [2]:80 nginx

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

A-d

B8080

C80

D--rm

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping port numbers or missing detached flag.

-d runs the container detached (in background). -p 8080:80 maps host port 8080 to container port 80.

5fill in blank

hard

Fill all three blanks to build a Docker image named 'myapp' from the current directory with no cache.

Docker

docker build [1] -t [2] [3]

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A--no-cache

Bmyapp

C.

D-f Dockerfile

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting build context or misplacing flags.

--no-cache disables cache during build, -t myapp tags the image, and . specifies the current directory as build context.