What is a Design Pattern?

Design patterns are repeatable template solutions for frequently occurring problems in software development.

Types of Design Patterns

a. Singleton

b. Observer / Pub Sub

c. Proxy

d. Circuit Breaker

e. Builder

f. Prototype

g. Iterator

h. Object Pool / Resource Pool

SOLID Principles

a. Single Responsibility Principle

b. Open Closed Principle

c. Liskov Substitution Principle

d. Interface Segregation Principle

e. Dependency Inversion Principle