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Design (LLD) Tic Tac Toe - C++

Mar 14 · 8 min read · 📌 1. Problem Statement Design a Tic Tac Toe game that: Supports configurable board size (N × N) Supports 2 players Validates moves Detects win efficiently Detects draw Logs moves Is extensible

Design (LLD) Rate Limiter - C++

Mar 2 · 13 min read · 📌 1. Functional Requirements A Rate Limiter system should: Limit requests per client/user Support multiple rate limiting algorithms Allow dynamic algorithm switching Support different limits per

Design (LLD) Vending Machine - C++

Feb 28 · 7 min read · 1️⃣ Functional Requirements A vending machine should support: Add products Add inventory (quantity) Insert money (multiple denominations) Select product Dispense product Return change Cancel tr

Design (LLD) Hotel Management System - C++

Feb 26 · 8 min read · 1️⃣ Functional Requirements A hotel system should support: Add hotel rooms Search rooms (by type, price, availability) Book room Cancel booking Check-in Check-out Generate bill Payment process

Designing a Like / Reaction System (Facebook / LinkedIn) - Database Modelling

Jan 19 · 4 min read · Modern platforms (Reddit, LinkedIn, YouTube) support multiple reaction types per entity. Core Requirements ✅ One user → one reaction per entity ✅ Reaction can change over time ✅ Extremely write-heavy ✅ Reads need fast aggregated counts ✅ Prevent...