EasyFree
Design an Elevator System - LLD Interview Problem. Master request dispatching & state management. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+5
15–30 min4 steps · 150 XP
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11 matching problems
BeginnerFree
Tutorial: Design a Parking Lot System - LLD Interview Problem. Master Singleton & Factory patterns. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+5
20–45 min4 steps · 100 XP
EasyPro
Design a Restaurant Management System - LLD Interview Problem. Master table state & order flow. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+6
15–30 min4 steps · 150 XP
MediumPro
Design a Car Rental System - LLD Interview Problem. Master booking logic & pricing strategies. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+5
30–60 min4 steps · 200 XP
MediumPro
Design an Elevator System - Multiple Lifts - LLD Interview Problem. Master load balancing & request distribution. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+5
30–60 min4 steps · 250 XP
MediumPro
Design an Elevator System - Single Lift - LLD Interview Problem. Master SCAN algorithm & request prioritization. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+5
30–60 min4 steps · 200 XP
HardPro
Design a Chat Room Manager - LLD Interview Problem. Master message queuing & presence tracking. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+7
60–90 min4 steps · 300 XP
HardPro
Design a Notification Service - LLD Interview Problem. Master multi-channel delivery & retry logic. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+7
60–90 min4 steps · 300 XP
HardPro
Design a Parking Lot - Multi-threaded - LLD Interview Problem. Master thread safety & deadlock prevention. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+8
60–90 min4 steps · 300 XP
HardPro
Design a Task Scheduler - LLD Interview Problem. Master DAG dependencies & exponential backoff. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+7
60–90 min4 steps · 300 XP
HardPro
Design an Elevator System - Request Feasibility - LLD Interview Problem. Master route planning & feasibility checks. Solutions in Python, Java, C++, TS, JS & C#.
Low Level DesignLLD+6
60–90 min4 steps · 300 XP