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Top 10 Low Level Design (LLD) Interview Questions

These are some of the most commonly asked Low Level Design interview questions for software engineering interviews and machine coding rounds. The problems below cover object-oriented design, class relationships, design patterns, scalability concepts, and real-world system modeling.

Each question links to a detailed solution with Java code, UML class diagrams, method explanations, and complete solution walkthroughs.

  1. Designing a Parking Lot - Low Level Design
  2. Design an Elevator / Lift System
  3. Design a Movie Ticket Booking System
  4. Design a Real-time Chat Application
  5. Design a Food Delivery System (Zomato/Swiggy)
  6. Design a Ride-Sharing System (Uber/Ola)
  7. Design a Rate Limiter System
  8. Design a Splitwise System
  9. Design an ATM System
  10. Design a Chess Game

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