Do you know the main principles of SOLID and how they are applied in software development?

SOLID is a set of five principles of object-oriented programming that help create flexible, extendable, and maintainable systems:

• S (Single Responsibility Principle) — The Single Responsibility Principle: each class should have only one reason to change, meaning it should be responsible for a single task.
• O (Open/Closed Principle) — The Open/Closed Principle: software entities should be open for extension but closed for modification.
• L (Liskov Substitution Principle) — Barbara Liskov's Substitution Principle: objects of subclasses should be interchangeable with objects of the base class without affecting the correctness of the program.
• I (Interface Segregation Principle) — The Interface Segregation Principle: it's better to have several specific interfaces than one general-purpose interface.
• D (Dependency Inversion Principle) — The Dependency Inversion Principle: high-level modules should not depend on low-level modules; both should depend on abstractions.

In Node.js, these principles help structure code, for example, by separating data processing logic and database interaction, using interfaces and abstractions to simplify testing and extend functionality without modifying existing code.