Learn Java from Scratch - A Beginner's Guide - Step 07 - Building REST API to Retrieve Details of a Course – GET

The video tutorial explains how to create a simple API to get course details by ID. It covers the importance of using variables instead of hardcoded values, refactoring code to handle errors, and using Optional to manage potential null values. The tutorial also demonstrates how to return course details or throw exceptions if a course is not found.

What is the recommended way to handle course IDs in the API?

Describe the process of extracting a local variable in the context of the API.

Explain the purpose of using an optional type for the course variable.

What should be done if a course with a specific ID is not found?

What happens when a non-existent course ID is provided to the API?