The cohesion indicates how the complete focus is imparted on just one entity, that is a module and its relative functional strength. As against, coupling represents the interdependence of modules with each other and with the external world.
Stamp coupling: It describes the use of composite data unit among the modules in order communication with each other. Control coupling: The data in one module is used to drive the control to the other module, that is control coupling.
Cohesion is an intrinsic property of a molecule, determined by its shape, structure, and electric charge distribution. When cohesive molecules approach each other, the electrical attraction between portions of each molecule holds them together.
When cohesive molecules approach each other, the electrical attraction between portions of each molecule holds them together. Cohesive forces are responsible for surface tension, the resistance of a surface to rupture when under stress or tension. A common example of cohesion is the behavior of water molecules.
Cohesion and coupling are related to each other. Each can affect the level of the other. High cohesion correlates with loose coupling. A module having its elements tightly related to each other and serving a single purpose would sparingly interact and depend on other modules.
Cohesion is the concept of intra-module. Coupling is the concept of inter-module. Cohesion represents the relationship within a module. Coupling represents the relationships between modules.
Coupling shows the relationships between modules. Cohesion shows the relationship within the module. Coupling shows the relative independence between the modules. Cohesion shows the module's relative functional strength. While creating, you should aim for low coupling, i.e., dependency among modules should be less.
High cohesion: Elements within one class/module should functionally belong together and do one particular thing. Loose coupling: Among different classes/modules should be minimal dependency.
"Coupling is a measure of interdependencies between modules, which should be minimized" "cohesion, a quality to be maximized, focuses on the relationships between the activities performed by each module."
Cohesion is an ordinal type of measurement and is usually described as “high cohesion” or “low cohesion”. Modules with high cohesion tend to be preferable, because high cohesion is associated with several desirable traits of software including robustness, reliability, reusability, and understandability.
Loose coupling is an approach to interconnecting the components in a system or network so that those components, also called elements, depend on each other to the least extent practicable. Coupling refers to the degree of direct knowledge that one element has of another.
The major difference between cohesion and coupling is that cohesion deals with the interconnection between the elements of the same module. But, coupling deals with the interdependence between software modules. Cohesion is defined as the degree of relationship between elements of the same module.
Cohesion and Coupling (C&C) are two major design decisive factors in OOD which impacts the design of a class and dependency between them in complex software. It is also most significant to measure C&C for software to control the complexity level as requirements increases.
High cohesion and loose coupling help us reduce accidental complexity and create modules with well-defined boundaries. Coupling is about connections, cohesion is about belonging together.
Coincidental cohesion: In this type of cohesion the tasks being executed have a loose relation between them. This could happen in the scenario when the functions in a module are chosen randomly.
Cohesion is the evaluation of the related functional strength of a module. In simple words, it is the measure of the amount of interaction within the module. Now, let’s understand what type of interaction within the module we are discussing here. The cohesion is all about integration where the actions are grouped in the most suitable way, actions present in the form of methods or functions. It is basically the interaction within the methods or functions inside a module. It concentrates on performing a single task within a software procedure, along with slightly interacting with the already executing procedure from another part of the program.
Communicational cohesion: The communicationally cohesive functions belong to or works on the same data structure. Sequential cohesion: In this type of cohesion the module entities are serially connected which means the next entity would require the output of the first entity.