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LLDCoding - Master LLD and Concurrency

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Design (LLD) Tic Tac Toe - C++

Subhahu JainSubhahu Jain
Mar 14, 20268 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...

Design (LLD) Tic Tac Toe - C++

Design (LLD) Rate Limiter - C++

Subhahu JainSubhahu Jain
Mar 2, 202613 min read

Master Rate Limiter LLD and Concurrency · 📌 1. Functional Requirements A Rate Limiter system should: Limit requests per client/user Support multiple...

Design (LLD) Rate Limiter - C++

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

Subhahu JainSubhahu Jain
Jan 19, 20264 min read

Modern platforms (Reddit, LinkedIn, YouTube) support multiple reaction types per entity. Core Requirements ✅ One user → one reaction per entity ✅...

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

[Uber] Design 🏢(LLD) Meeting Scheduler - Machine Coding Interview

Subhahu JainSubhahu Jain
Nov 9, 20254 min read

We are designing a meeting scheduler with the following requirements: There are N rooms. We are given a stream of meeting requests (start time, end...

[Uber] Design 🏢(LLD) Meeting Scheduler - Machine Coding Interview

Design (LLD) Internet Download Manager like IDM - Machine Coding Interview

Subhahu JainSubhahu Jain
Jan 14, 20251 min read

Feature Requirements Download File: The system should support downloading a file from a given URL using HTTP/HTTPS protocols. Segmented Downloading:...

Design (LLD) Internet Download Manager like IDM - Machine Coding Interview

Design (LLD) Coupon System For Zepto - Machine Coding Interview

Subhahu JainSubhahu Jain
Dec 18, 20247 min read

Asked in LLD Interview for SDE-2 Problem Statement: Design a Coupon Recommendation System for Zepto that fulfills the following requirements: Key...

Design (LLD) Coupon System For Zepto - Machine Coding Interview