4.5.5 Lab - Explore REST APIs with API Simulator and Postman

Note: If you consider the pace of my speech is slow, you can increase the speed to 1.25.

[judebaba]

Help me out chromium browser is not opening how can I fix it

[seanhamty]

Hi there im having difficult time deleting the book id of 4...at the server response it is saying Error 400 and that API is required

What am I doing wrong?!