API Testing with Postman - Understanding Web Services and APIs

The video introduces API testing, explaining web services and APIs as functions with inputs and outputs. It uses the analogy of a black box to describe how APIs work, focusing on the inputs and outputs without needing to understand the internal workings. The video demonstrates using Postman to make API calls and retrieve data in JSON format, highlighting the simplicity and power of API testing.

What is the purpose of an API in the context of web services?

Explain the concept of a web service as described in the text.

How does the analogy of a mathematical function help in understanding APIs?

What is JSON and how is it used in API responses?

Discuss the importance of treating a web service as a black box in testing.