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Single Responsibility Principle for Modular Software Design Explained?
Single Responsibility Principle separates concerns in software design, ensuring one job per class to boost modularity, maintainability, and reduce change propagation effectively.
Question
Which design principle emphasizes the importance of separating concerns to improve modularity and maintainability in software design?
A. Open/Closed Principle
B. Dependency Inversion Principle
C. Interface Segregation Principle
D. Single Responsibility Principle
Answer
D. Single Responsibility Principle
Explanation
The Single Responsibility Principle (SRP) emphasizes that a class or module should have only one reason to change, meaning it handles a single, well-defined responsibility, which separates concerns to achieve high cohesion within modules and low coupling between them, directly improving modularity and maintainability. By isolating distinct functionalities—like data access, business logic, or UI rendering—SRP prevents changes in one area from rippling across unrelated code, making systems easier to understand, test, extend, and debug compared to broader SOLID principles like Open/Closed (A) for extensibility, Dependency Inversion (B) for inversion of dependencies, or Interface Segregation (C) for client-specific interfaces.