FROM instruction for base image in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Dockerfile to specify the base image as Ubuntu 20.04.

Docker

FROM [1]

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

Aubuntu:20.04

Bnode:14

Cpython:3.9

Dalpine:latest

Attempts:

3 left

💡 Hint

Common Mistakes

Using an unrelated base image like 'node:14' when Ubuntu is required.

Forgetting the version tag after the image name.

The FROM instruction sets the base image for the Dockerfile. Here, ubuntu:20.04 specifies Ubuntu version 20.04 as the base.

2fill in blank

medium

Complete the Dockerfile to use Alpine Linux as the base image.

Docker

FROM [1]

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

Adebian:10

Balpine:3.15

Cubuntu:latest

Dcentos:7

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a base image that is not Alpine Linux.

Using 'alpine:latest' when a specific version is preferred.

The FROM instruction here uses Alpine Linux version 3.15 as the base image, which is a small and efficient Linux distribution.

3fill in blank

hard

Fix the error in the Dockerfile base image specification.

Docker

FROM [1]

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

Apython3.8

Bpy:3.8

Cpython-3.8

Dpython:3.8

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'python3.8' without a colon.

Using hyphens instead of colons in the tag.

The correct Docker base image tag for Python 3.8 is python:3.8. Other options are invalid image names and will cause errors.

4fill in blank

hard

Fill both blanks to specify a Node.js base image with version 16 and use the slim variant.

Docker

FROM [1]:[2]-slim

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

Anode

B14

C16

Dalpine

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the version numbers or using the wrong image name.

Using 'alpine' instead of 'slim' for the variant.

The base image is node:16-slim, which uses Node.js version 16 with a smaller slim variant.

5fill in blank

hard

Fill all three blanks to specify a Python base image with version 3.10 and the slim-buster variant.

Docker

FROM [1]:[2]-[3]

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

Apython

B3.10

Cslim-buster

Dbuster

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'buster' instead of 'slim-buster' for the variant.

Mixing up the order of version and variant.

The correct base image is python:3.10-slim-buster, which uses Python 3.10 with the slim-buster variant for a smaller image size.