What is the primary purpose of the Dependency Inversion Principle (DIP) in software design?
a) To reduce dependencies on low-level modules by depending on abstractions
b) To increase the number of dependencies in a system
c) To design software without using any external libraries
d) To ensure that all components are tightly coupled
Answer:
a) To reduce dependencies on low-level modules by depending on abstractions
Explanation:
The Dependency Inversion Principle (DIP) is one of the SOLID principles of software design. It states that high-level modules should not depend on low-level modules, but both should depend on abstractions (such as interfaces or abstract classes).
This principle helps reduce tight coupling between components and makes the system more flexible, maintainable, and testable. By depending on abstractions, the system is easier to extend and modify without affecting other parts of the code.
The Dependency Inversion Principle is commonly applied in object-oriented design to achieve modularity and allow for easier unit testing through dependency injection.