Description

Format: PDF + Interactive Glossary + Mini Quiz

Contents:

• What is an API (in plain English)

• REST vs SOAP vs GraphQL: differences and use cases

• How the client-server model works

• Structure of an HTTP request (method, URL, headers, body)

• Response codes: 200, 201, 400, 401, 404, 500 explained

• The role of APIs in app architecture

• Why API testing is essential in QA

📌 Practice:
Example walkthroughs of real API calls.
Short quiz to check your understanding.

🎯 After this guide:
You’ll understand what APIs do and why they are tested — the foundation of all that follows.