Image naming conventions (registry/image:tag) in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the image with the official Docker Hub registry.

Docker

docker pull [1]/ubuntu:latest

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

Aregistry.hub.docker.com

Bhub.docker.com

Cdocker.io

Ddockerhub

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'dockerhub' which is not a valid registry prefix.

Using 'hub.docker.com' which is a website, not the registry name.

The official Docker Hub registry is referenced as docker.io. This prefix is optional but correct.

2fill in blank

medium

Complete the code to tag an image with a specific version.

Docker

docker tag myapp [1]/myrepo/myapp:1.0

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Amyregistry.com:5000

Bmyregistry

Cmyregistry.com

Dmyregistry:5000

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the port number when required.

Using invalid registry names without domain format.

When specifying a registry with a custom port, include the port after a colon, like myregistry.com:5000.

3fill in blank

hard

Fix the error in the image name to correctly specify the tag.

Docker

docker pull alpine[1]latest

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A:

B/

C_

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using slash or dash instead of colon to separate tag.

Omitting the colon causes Docker to treat 'latest' as part of the image name.

The tag is separated from the image name by a colon :, not a slash or dash.

4fill in blank

hard

Fill both blanks to create a valid image name with registry and tag.

Docker

docker push [1]/[2]:stable

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Aregistry.example.com

Bmyapp

Cappimage

Dexample.com

Attempts:

3 left

💡 Hint

Common Mistakes

Using just 'example.com' without 'registry.' prefix if that is the registry.

Confusing image name with registry domain.

The registry is registry.example.com and the image name is appimage. The tag stable is after the colon.

5fill in blank

hard

Fill all three blanks to create a full image name with registry, repository, and tag.

Docker

docker pull [1]/[2]/[3]:v2

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

Aregistry.io

Blibrary

Cnginx

Ddockerhub

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'dockerhub' which is not a valid registry name.

Mixing up repository and image names.

The full image name includes the registry registry.io, the repository library, and the image nginx. The tag v2 specifies the version.