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Low Level Design (LLD) Coding

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🎮 Multiplayer Game Sync (e.g., "Among Us" Style) Concurrency Problem

Subhahu JainSubhahu Jain
Jul 10, 20251 min read

Let's model the synchronization challenges in a social deduction game like Among Us, where: 10-15 players (threads) interact in real-time Shared...

🎮 Multiplayer Game Sync (e.g., "Among Us" Style) Concurrency Problem

🏦 Bank Transaction Concurrency Problem

Subhahu JainSubhahu Jain
Jul 8, 20252 min read

Problem Statement Multiple threads (ATM users, online banking) access shared bank...

🏦 Bank Transaction Concurrency Problem

🚂 Train Deadlock Concurrency Problem

Subhahu JainSubhahu Jain
Jul 7, 20252 min read

Problem Statement Multiple trains run on a shared circular track (like a subway loop). Only one train can occupy a track segment at a time (mutual...

🚂 Train Deadlock Concurrency Problem

🚦 Traffic Light Concurrency Problem

Subhahu JainSubhahu Jain
Jul 5, 20252 min read

Problem Statement:Simulate a traffic intersection where: Multiple roads (threads) lead to a single intersection (shared resource). Only one...

🚦 Traffic Light Concurrency Problem

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, 20243 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