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Low-Level Design

Object-oriented design: the patterns, the SOLID principles, and the machine-coding problems you get asked to build.

46 guides

Design problems · 20

D
Design a Food Delivery System
Hard
→
D
Design a Hotel Booking System
Hard
→
D
Design a Library Management System
Medium
→
D
Design a Logging Framework
Medium
→
D
Design a Movie Ticket Booking System
Hard
→
D
Design a Notification System
Medium
→
D
Design a Parking Lot
Medium
→
D
Design a Pub-Sub System
Hard
→
D
Design a Rate Limiter
Medium
→
D
Design a Ride Hailing System
Hard
→
D
Design a Text Editor with Undo and Redo
Medium
→
D
Design a Vending Machine
Medium
→
D
Design an ATM
Medium
→
D
Design an Elevator System
Medium
→
D
Design an LRU Cache
Medium
→
D
Design an Online Shopping Cart
Medium
→
D
Design Chess
Hard
→
D
Design Snake and Ladder
Easy
→
D
Design Splitwise
Medium
→
D
Design Tic-Tac-Toe
Easy
→

Patterns & principles · 26

A
Abstract Factory Pattern
Medium
→
A
Adapter Pattern
Medium
→
B
Bridge Pattern
Medium
→
B
Builder Pattern
Medium
→
C
Chain of Responsibility Pattern
Medium
→
C
Class Relationships: Association, Aggregation, Composition
Medium
→
C
Command Pattern
Medium
→
C
Composite Pattern
Medium
→
D
Decorator Pattern
Medium
→
D
Design Principles: DRY, KISS, YAGNI, Coupling and Cohesion
Medium
→
F
Facade Pattern
Easy
→
F
Factory Method Pattern
Medium
→
F
Flyweight Pattern
Hard
→
H
How to Approach an LLD Interview
Medium
→
I
Iterator Pattern
Easy
→
M
Mediator Pattern
Medium
→
O
Object-Oriented Programming for LLD
Easy
→
O
Observer Pattern
Medium
→
P
Prototype Pattern
Medium
→
P
Proxy Pattern
Medium
→
S
Singleton Pattern
Easy
→
S
SOLID Principles
Medium
→
S
State Pattern
Medium
→
S
Strategy Pattern
Easy
→
T
Template Method Pattern
Easy
→
U
UML and Class Diagrams
Easy
→
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Other sectionsHigh-Level DesignDSA PatternsCS FundamentalsBehavioral