What Is an API? The Invisible Technology Behind Every App You Use | Day 6

n Day 6 of the Software Architecture & System Design Fundamentals series, we explore one of the most important concepts in modern software development: APIs. Learn what an API is, why it is needed, how frontend and backend communicate, and how APIs power real-world applications such as weather apps, Google Maps, payments, Gmail, AI tools, and more. This session also covers: API request and response API endpoints Internal, external, public, and third-party APIs Real-life API examples API usage in MERN, Python/AIML, and GenAI applications Timestamps 00:00 - Introduction & Morning Sync Setup 05:15 - Recap: The Request-Response Cycle (Module 5) 12:30 - What is an API? (The Bridge Concept) 22:45 - Why Do We Use APIs? (Efficiency & Automation) 35:10 - How APIs Work (Under the Hood) 48:20 - Understanding API Architecture (Client, Server & Database) 1:02:15 - Real-World Examples (Google Maps, Open AI, Razorpay) 1:18:40 - Deep Dive: HTTP Methods & Status Codes 1:28:10 - Q&A: Authentication vs. Authorization 1:34:55 - Final Takeaways & Wrap Up Key takeaway: APIs act as a communication bridge between different software systems. #API #APIsExplained #SoftwareArchitecture #SystemDesign #WebDevelopment #BackendDevelopment #FrontendDevelopment #MERNStack #Python #AIML #GenAI #SoftwareEngineering #JASIQLabs #RealWorkStudio