LLD of restorent food ordering

Design circuit break pattern

Singleton design pattern

Singleton design pattern is a creation design pattern where class is restricted to have only one instance in t...

Solid Principle: Single Responsibility

every software component should have only and only one reason to change

LLD interview question

Adapter and facade pattern

Command pattern

Chain of Responsibility pattern

Decorator pattern

Observer Pattern

The Observer Pattern defines a one-to-many dependency between objects so that when one object changes state, a...