The Complete Practical Docker Guide - Running Hello-World Container

The video tutorial introduces Docker by demonstrating how to run a simple 'Hello World' container. It explains the process of pulling an image from Docker Hub, running it, and understanding the interaction between Docker client and daemon. The tutorial also covers the caching mechanism and details of Docker images, including their IDs and sizes.

What is the primary purpose of the Hello World container in Docker?

• To run a web server

• To print a message to the terminal

• To create a new Docker image

• To perform complex computations

What happens if the Hello World image is not found locally when you run the command?

• The command fails with an error

• Docker automatically pulls the image from Docker Hub

• The system prompts the user to download the image

• The command runs a different default image

Which component of Docker is responsible for pulling images from Docker Hub?

• Docker Container

• Docker Client

• Docker Daemon

• Docker Registry

What is the size of the Hello World image?

• 5 megabytes

• 1 gigabyte

• 2 kilobytes

• 10 kilobytes

What does Docker do when you run the same command multiple times?

• It prompts the user for confirmation

• It pulls the image again from Docker Hub

• It uses the cached image from the local system

• It creates a new image each time