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SOLID Principles notes for developers

Master SOLID Principles with a curated set of 5 developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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SOLID Principles

Single Responsibility Principle

Single Responsibility Principle (SRP) "A class should have one, and only one, reason to change." The Single Responsibility Principle states that a class should

SOLID Principles

Open/Closed Principle

Open/Closed Principle (OCP) "Software entities should be open for extension but closed for modification." The Open/Closed Principle means you should be able to

SOLID Principles

Liskov Substitution Principle

Liskov Substitution Principle (LSP) "Objects of a superclass should be replaceable with objects of its subclasses without breaking the application." The Liskov

SOLID Principles

Interface Segregation Principle

Interface Segregation Principle (ISP) "No client should be forced to depend on methods it does not use." The Interface Segregation Principle states that large i

SOLID Principles

Dependency Inversion Principle

Dependency Inversion Principle (DIP) "High-level modules should not depend on low-level modules. Both should depend on abstractions." The Dependency Inversion P

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