Author name: Admin

⏱ 9 min read Low-Level Design: Food Delivery System (OOP Interview) The food delivery system (DoorDash/Uber Eats style) is a rich OOP design problem Read article

⏱ 8 min read Low-Level Design: Chat Application (OOP Interview) A chat application combines real-time messaging, user management, conversation threading, and notification delivery. It’s Read article

⏱ 6 min read Low-Level Design: Vending Machine (OOP Interview) The vending machine is a classic state machine design question. It tests whether you Read article

⏱ 9 min read Graph Traversal Interview Patterns (2025) Graph problems are among the most common in FAANG interviews — they appear as network Read article

⏱ 8 min read Shortest Path Algorithm Interview Patterns (2025) Shortest path problems are fundamental in graph interviews. Knowing when to apply BFS, Dijkstra, Read article

⏱ 7 min read Low-Level Design: Tic-Tac-Toe Game Tic-Tac-Toe is a common LLD warm-up question that tests your ability to model game state, validate Read article

⏱ 8 min read Low-Level Design: Movie Ticket Booking System The Movie Ticket Booking system (like BookMyShow or Fandango) is a popular LLD interview Read article

⏱ 6 min read Low-Level Design: Snake and Ladder Game Snake and Ladder (also called Chutes and Ladders) is a popular LLD interview problem Read article

⏱ 8 min read Low-Level Design: ATM Machine The ATM Machine is a classic LLD problem that tests state machine design, OOP modeling, and Read article

⏱ 8 min read Segment Tree Interview Patterns (2025) Segment Trees are powerful data structures for range query problems — they answer range sum, Read article

⏱ 7 min read Low-Level Design: Hotel Booking System (OOP) The Hotel Booking System is a rich LLD problem that combines real-world business rules Read article