15 Most-Asked Low-Level Design Problems (Java) with Prakhar Jain

Full description: Stop failing LLD rounds because of a messy design or a "God class".

This 88-page kit walks you through the 15 problems that come up again and again in SDE-1, SDE-2, and SDE-3 interviews: Parking Lot · BookMyShow · Splitwise · Elevator · LRU Cache · Rate Limiter · Snake & Ladder · Vending Machine · Logger · Library · Chess · ATM · Food Delivery (Swiggy/Zomato) · Notification Service · Pub-Sub

For every problem you get: ✅ What to ask in the first 5 minutes (requirements and scope) ✅ Core entities and a clean class diagram ✅ Which design patterns to use, and the one-line reason to say out loud ✅ Complete, runnable Java code (every file compiles on Java 17+) ✅ 5 follow-up questions interviewers ask, with crisp answers ✅ Common mistakes that cost you the round

Plus: a 45-minute LLD interview framework, a design patterns cheat sheet, SOLID and concurrency quick references, and a one-page revision sheet for the night before.