How solid principles are used in application

Question

Accepted Answer

Solid principles are used in application development to create maintainable, scalable, and flexible software.

Solid principles help in achieving modular and loosely coupled code.
Single Responsibility Principle (SRP) ensures that a class has only one reason to change.
Open-Closed Principle (OCP) allows for extension without modification.
Liskov Substitution Principle (LSP) ensures that derived classes can be substituted for their base classes.
Interface Segregation Principle (ISP) promotes smaller, focused interfaces.
Dependency Inversion Principle (DIP) encourages dependency injection and decoupling.
Example: Applying SRP, a class responsible for database operations should not also handle user authentication.
Example: Applying OCP, new functionality can be added by creating new classes that implement existing interfaces.
Example: Applying LSP, a derived class should be able to replace its base class without affecting the behavior of the system.
Example: Applying ISP, interfaces should be tailored to the specific needs of the clients that use them.
Example: Applying DIP, high-level modules should not depend on low-level modules, but both should depend on abstractions.

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