Why debugging containers matters in Docker - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to list all running Docker containers.

Docker

docker [1]

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

Aps

Bbuild

Cstart

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

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

The docker ps command lists all running containers. This helps you see which containers are active and may need debugging.

2fill in blank

medium

Complete the code to start an interactive shell inside a running container named 'webapp'.

Docker

docker exec -it webapp [1]

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

Als

B/bin/bash

Cstop

Drm

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ls' which only lists files, not open a shell.

The command docker exec -it webapp /bin/bash opens an interactive shell inside the 'webapp' container, allowing you to debug inside it.

3fill in blank

hard

Fix the error in the command to view logs of a container named 'db'.

Docker

docker logs [1]

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

Adb

Bdatabase

Clog

Dcontainer

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong container names like 'database' or 'container'.

The correct container name is 'db'. Using the exact container name is necessary to view its logs.

4fill in blank

hard

Fill both blanks to create a Docker command that shows logs and follows new log entries for container 'api'.

Docker

docker logs [1] [2]

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

A-f

Bapi

C--tail

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using '--tail' instead of '-f' to follow logs.

The command docker logs api -f shows the logs of the 'api' container and keeps following new log entries live.

5fill in blank

hard

Fill all three blanks to create a command that builds a Docker image named 'myapp' from the current directory.

Docker

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

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

Abuild

Bmyapp

C.

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'run' instead of 'build' to create an image.

The command docker build -t myapp . builds a Docker image named 'myapp' using the Dockerfile in the current directory.