LLD Question Bank
Pick your next design problem.
Curated LLD problems with company tags, suggested patterns, and progress tracking.
Status
Problem
Difficulty
Concepts
Time
Design a Parking Lot
Amazon, Google
Medium
StrategyFactory
45m
Splitwise
Splitwise, Uber
Medium
ObserverStrategy
50m
Elevator System
Microsoft, Uber
Hard
StateStrategy
60m
BookMyShow
BookMyShow, Atlassian
Hard
ConcurrencyFactory
60m
Cricbuzz Scorecard
Cricbuzz
Medium
ObserverComposite
45m
Cab Booking (Uber)
Uber, Ola
Hard
StrategyObserver
60m
Snake and Ladder
Adobe
Easy
OOPCommand
30m
Inventory Management
Amazon, Flipkart
Medium
RepositoryObserver
45m
Library Management
Walmart
Easy
OOPRepository
35m
Food Delivery System
Swiggy, DoorDash
Hard
StateStrategy
70m