Minimizing layers in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Dockerfile line to start from the official Python image.

Docker

FROM [1]

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

Aalpine:3.18

Bnode:18

Cpython:3.12-slim

Dubuntu:latest

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing a non-Python base image like Ubuntu or Node.

The FROM instruction sets the base image. Using python:3.12-slim starts from a minimal Python image.

2fill in blank

medium

Complete the RUN command to update package lists in one layer.

Docker

RUN apt-get update && apt-get [1] -y curl

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

Aupgrade

Binstall

Cremove

Dclean

Attempts:

3 left

💡 Hint

Common Mistakes

Using upgrade or remove instead of install.

The command apt-get install -y installs packages without asking for confirmation, combined with update in one layer.

3fill in blank

hard

Fix the error in combining commands to minimize layers.

Docker

RUN apt-get update [1] apt-get install -y curl

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

A||

B;

C|

D&&

Attempts:

3 left

💡 Hint

Common Mistakes

Using semicolon or pipe which do not ensure success before next command.

The && operator ensures the second command runs only if the first succeeds, combining commands in one layer.

4fill in blank

hard

Fill both blanks to combine copying files and installing dependencies in one RUN command.

Docker

COPY requirements.txt /app/requirements.txt
RUN pip [2] -r /app/requirements.txt [1] rm /app/requirements.txt

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

A&&

Binstall

Cupdate

D&&&

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid separators or wrong pip commands.

Use && to chain commands and pip install to install dependencies.

5fill in blank

hard

Fill all three blanks to create a minimal Dockerfile that installs curl and cleans cache in one RUN.

Docker

FROM python:3.12-slim
RUN apt-get update [1] apt-get install -y [2] [3] apt-get clean

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

A&&

Bcurl

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using pipe instead of &&, or missing package name.

Use && to chain commands safely and install curl before cleaning cache.