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What is low coupling and high cohesion?
sobes.tech AI
Answer from AI
Low coupling and high cohesion are design principles aimed at creating maintainable, extendable, and testable code.
Low Coupling
- Means that components (classes, modules) depend minimally on each other. Changes in one component have minimal impact on others.
- Characteristics of low coupling:
- Components interact through well-defined interfaces.
- Direct access to internal details of other components is minimized.
- Changes in the implementation of one component do not require changes in others.
- Advantages:
- Simplifies testing of individual components.
- Code becomes more flexible and easier to extend.
- Reduces the risk of errors when making changes.
High Cohesion
- Means that elements within a component are logically related and perform a single well-defined task. A highly cohesive component is focused on one responsibility.
- Characteristics of high cohesion:
- All class methods relate to a single functional area.
- The class does not contain unrelated functionality.
- Logic related to a single task is concentrated in one place.
- Advantages:
- Code becomes more understandable and readable.
- Simplifies localization and error correction.
- The component becomes more reusable.
Ideally, one should aim for low coupling between components and high cohesion within each component.