Go to GitHub, type stars:>1000 system design interview into the search bar, bookmark the top three repos, and start studying tonight.
This is a standout chapter in Volume 2. It addresses the problem of finding nearby points of interest (e.g., "Find all coffee shops within 500 meters"). Go to GitHub, type stars:>1000 system design interview
While Volume 1 touched on chat apps, Volume 2 scales it up to WhatsApp levels. Go to GitHub