Graph Traversal Interview Patterns (2025) Graph problems are among the most common in FAANG interviews — they appear as network […]

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

Low-Level Design: Library Management System (OOP Interview) The library management system is a popular OOP design question that tests your

Shortest Path Algorithm Interview Patterns (2025) Shortest path problems are fundamental in graph interviews. Knowing when to apply BFS, Dijkstra,

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

Low-Level Design: Movie Ticket Booking System The Movie Ticket Booking system (like BookMyShow or Fandango) is a popular LLD interview

Low-Level Design: Snake and Ladder Game Snake and Ladder (also called Chutes and Ladders) is a popular LLD interview problem

Segment Tree Interview Patterns (2025) Segment Trees are powerful data structures for range query problems — they answer range sum,

Low-Level Design: ATM Machine The ATM Machine is a classic LLD problem that tests state machine design, OOP modeling, and

Low-Level Design: Hotel Booking System (OOP) The Hotel Booking System is a rich LLD problem that combines real-world business rules

Low-Level Design: Parking Lot System The parking lot LLD is one of the most common interview questions at companies like