Coupling And Cohesion
Coupling and cohesion are fundamental software design principles that describe the relationships between modules in a system. Coupling refers to the degree of interdependence between modules, with low coupling being desirable for maintainability, while cohesion measures how closely related the responsibilities within a single module are, with high cohesion indicating a well-focused module. These concepts are key to creating modular, scalable, and easy-to-maintain software architectures.
Developers should learn and apply coupling and cohesion principles to design systems that are easier to test, debug, and modify over time. Low coupling reduces the risk of changes in one module affecting others, making it essential for large-scale applications and agile development, while high cohesion ensures modules have clear, single responsibilities, improving code readability and reusability. These are critical in object-oriented design, microservices architectures, and refactoring legacy codebases.