Docker Desktop overview - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to check the Docker Desktop version installed on your computer.

Docker

docker [1]

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

Astart

Bbuild

Crun

Dversion

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker start' instead of 'docker version'.

Confusing 'docker run' with version check.

The docker version command shows the installed Docker Desktop version and client/server details.

2fill in blank

medium

Complete the command to list all running containers in Docker Desktop.

Docker

docker container [1]

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

Aimages

Bls

Cbuild

Dpull

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using 'docker container pull' which downloads images.

The docker container ls command lists all running containers.

3fill in blank

hard

Fix the error in the command to start Docker Desktop from the command line on Windows.

Docker

start "[1]"

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

ADocker Desktop

Bdocker-desktop.exe

Cdocker

Ddocker desktop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start docker-desktop.exe' which may not work if path is missing.

Using lowercase or missing quotes around app name.

On Windows, the command start "Docker Desktop" opens the Docker Desktop app.

4fill in blank

hard

Fill both blanks to create a Docker Desktop command that shows system-wide information and resource usage.

Docker

docker [1] [2]

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

Asystem

Binfo

Cstats

Dps

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker stats' which shows live container stats, not system info.

Using 'docker ps' which lists containers.

The command docker system info shows detailed system and resource information.

5fill in blank

hard

Fill all three blanks to write a command that builds a Docker image with a tag 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 'docker run' instead of 'docker build'.

Missing the dot '.' to specify the current directory.

The command docker build -t myapp . builds an image tagged 'myapp' from the current folder.

Practice

1. What is the main purpose of Docker Desktop on your personal computer?

easy

A. To develop mobile applications only

B. To replace your operating system with Linux

C. To easily run and manage containers with a user-friendly interface

D. To act as a web browser

Solution

1. Step 1: Understand Docker Desktop's role

   Docker Desktop helps users run containers easily on their computers.

2. Step 2: Identify the correct purpose

   It provides a simple way to manage containers with graphical and command line tools.

3. Final Answer:

   To easily run and manage containers with a user-friendly interface -> Option C

4. Quick Check:

   Docker Desktop = Easy container management [OK]

Hint: Docker Desktop = easy container use on PC [OK]

Common Mistakes:

• Thinking Docker Desktop replaces the OS
• Confusing Docker Desktop with mobile app tools
• Assuming it is a web browser

2. Which of the following commands correctly starts Docker Desktop from the command line on Windows?

easy

A. docker start desktop

B. start docker-desktop

C. start com.docker.diagnose

D. open Docker Desktop

Solution

1. Step 1: Recall Docker Desktop command line usage

   On Windows, Docker Desktop can be started using the command start docker-desktop.

2. Step 2: Evaluate options

   start docker-desktop is the correct command to start Docker Desktop on Windows. start com.docker.diagnose is for diagnostics, not starting the app.

3. Final Answer:

   start docker-desktop -> Option B

4. Quick Check:

   Windows Docker Desktop start = start docker-desktop [OK]

Hint: Windows uses 'start docker-desktop' to launch Docker Desktop [OK]

Common Mistakes:

• Using 'docker start desktop' which is invalid
• Trying 'open Docker Desktop' like a Mac command
• Confusing command names

3. If you enable Kubernetes in Docker Desktop, what happens when you run kubectl get pods in the terminal?

medium

A. It shows the list of running Kubernetes pods managed by Docker Desktop

B. It returns an error because Kubernetes is not supported

C. It lists Docker containers instead of pods

D. It opens the Docker Desktop GUI

Solution

1. Step 1: Understand Kubernetes integration in Docker Desktop

   Docker Desktop can run a local Kubernetes cluster when enabled.

2. Step 2: Interpret kubectl get pods command

   This command lists all pods running in the Kubernetes cluster managed by Docker Desktop.

3. Final Answer:

   It shows the list of running Kubernetes pods managed by Docker Desktop -> Option A

4. Quick Check:

   Kubernetes enabled = kubectl shows pods [OK]

Hint: Enable Kubernetes to use kubectl commands locally [OK]

Common Mistakes:

• Thinking Kubernetes is unsupported in Docker Desktop
• Confusing pods with Docker containers
• Expecting GUI to open from kubectl

4. You installed Docker Desktop but the Docker icon does not appear in the system tray. What is the most likely fix?

medium

A. Restart Docker Desktop or your computer to refresh the system tray

B. Uninstall and reinstall your operating system

C. Run docker run command immediately

D. Disable Kubernetes in Docker Desktop settings

Solution

1. Step 1: Identify common Docker Desktop startup issues

   Sometimes the Docker icon does not show due to startup glitches.

2. Step 2: Apply the simplest fix

   Restarting Docker Desktop or the computer usually resolves the missing icon issue.

3. Final Answer:

   Restart Docker Desktop or your computer to refresh the system tray -> Option A

4. Quick Check:

   Missing icon fix = restart Docker Desktop/computer [OK]

Hint: Restart Docker Desktop or PC to fix missing icon [OK]

Common Mistakes:

• Reinstalling OS unnecessarily
• Running Docker commands before Docker is ready
• Disabling Kubernetes unrelated to icon issue

5. You want to share your local Docker Desktop containers with a teammate who uses a different OS. Which feature helps you do this easily?

hard

A. Use Docker Desktop's built-in cloud sync to share containers directly

B. Use Kubernetes to automatically sync containers across OS

C. Run containers only on the same OS to avoid compatibility issues

D. Export the container as an image and share the image file

Solution

1. Step 1: Understand cross-OS container sharing

   Containers can be saved as images and shared as files, which work across OS.

2. Step 2: Evaluate options for sharing

   Docker Desktop does not have direct cloud sync for containers; Kubernetes does not sync containers automatically.

3. Final Answer:

   Export the container as an image and share the image file -> Option D

4. Quick Check:

   Share containers = export image file [OK]

Hint: Export container image to share across OS [OK]

Common Mistakes:

• Assuming Docker Desktop syncs containers automatically
• Thinking Kubernetes syncs containers by default
• Believing containers must run on same OS