Focuses on fundamentals like scaling from zero to millions, back-of-the-envelope estimations, and designing standard systems like a URL shortener or Web Crawler.

System Design Interview – An Insider’s Guide (Volumes 1 & 2) Author: Alex Xu (co-founder of ByteByteGo) Target Audience: Software engineers preparing for FAANG and system design interviews (L4–L6 equivalent) Key Focus: Step-by-step framework for solving open-ended design problems under interview time constraints.

Don't just read the PDF.

Indian culture is a living mosaic, defined by the principle of Vasudhaiva Kutumbakam

If you want a "cheat sheet" PDF, Alex Xu’s official website provides a free System Design Interview Cheat Sheet (PDF) when you sign up for his newsletter. Start there.