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Explain what the SOLID principles mean in object-oriented programming

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Answer from AI

SOLID principles are a set of five fundamental rules of object-oriented design aimed at creating flexible, extendable, and maintainable systems:

  1. S (Single Responsibility Principle) — A class should have only one reason to change, meaning it should perform a single specific task.

  2. O (Open/Closed Principle) — Software entities should be open for extension but closed for modification.

  3. L (Liskov Substitution Principle) — Subtypes must be substitutable for their base types without altering the correctness of the program.

  4. I (Interface Segregation Principle) — It's better to have several specific interfaces than a single general-purpose interface.

  5. D (Dependency Inversion Principle) — High-level modules should not depend on low-level modules; both should depend on abstractions.

These principles help create code that is easier to test, extend, and maintain.