📮 Postman

Learn Postman API testing with collections, environments, scripts, Newman, CI integration, troubleshooting and interview practice.

From zero to interview-level Postman mastery. Learn to send requests, write automated test scripts, manage environments, chain requests, run collections with Newman, and integrate into CI/CD pipelines — with real QA scenarios throughout.

What you can learn on this page

🎯 What is Postman & API Testing? — Imagine you want to order food from a restaurant. You could walk in and order at the counter — that's like using a website. But you can also call them on the phone and place an order directly without going in person — that's Postman! It lets you "call&quo
📦 Installation & First Request — Installing Postman is like getting a brand-new multi-tool kit. You open the box and every tool is already organized and labeled. Just pick up the right tool (GET, POST, DELETE...) and use it — no assembly required. Downloading Postman
📚 Collections, Variables & Microservices — Imagine a big office building with 4 departments: Security (Auth), HR (Users), Logistics (Orders), Finance (Payments). Each has its own phone extension. Postman is your master phone directory — it can call all 4 departments at once, remembers every number, and
🔥 Writing Automated Tests — Test scripts in Postman are like a quality inspector on a factory line. After each product comes off the line (API response), you check a checklist: Is the shape correct? Is the value right? If anything fails, you mark it "FAIL" and the alarm goes of
💼 Interview Questions — These questions appear in QA interviews at all levels. Basic: daily Postman knowledge. Intermediate: environments, automation, Newman. Advanced: CI/CD integration, data-driven testing, API design principles.