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What is the difference between coupling and cohesion?

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Answered 2011-02-08 21:28:28

Cohesion of a single module/component is the degree to which its responsibilities form a meaningful unit; higher cohesion is better.

Coupling between modules/components is their degree of mutual interdependence; lower coupling is better.

  • Size: number of connections between routines.
  • Intimacy: the directness of the connection between routines.
  • Visibility: the prominence of the connection between routines.
  • Flexibility: the ease of changing the connections between routines.

A first-order principle of software architecture is to increase cohesion and reduce coupling.

Additional information can be found at the link I added below.

Coupling and cohesion are often used as opposite ends of a scale in measuring how "good" a piece of software is. They are very common metrics for measuring the quality of object-oriented code.

Cohesion describes how "focused" a piece of software is. A highly-cohesive system is one in which all procedures in a given module work together towards some end goal. High cohesion is often characterized by high readability and maintainability.

Coupling describes how reliant a given piece of software is on other modules. A highly coupled system in one in which the procedures in one module can directly access elements of another module. A low coupled system in one in which the procedures of one module can only interact with the procedures of another through an interface channel. Highly coupled systems are often characterized by code that is difficult to read and maintain (the reason cohesion and coupling are often used as opposites).

If you know what UML diagrams look like, then you can think of a highly coupled system as one in which there are multiple arrows pointing away from and into each module in the diagram.

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coupling is a computer program, which is meant for the maintenance of the cohesion , coupling is inversely proportional to cohesion. When coupling and cohesion is combined then it acts as support to the high readability and maintainability of a computer program.

Coupling within a software system is the degree to which to which each module relies on other modules cohesion is the measure of a sub systems internal interdependence

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There should be low dependence and high interaction between the modules. The dependence should be low so that the module can work in absence of another module. So, there should be low coupling ad high cohesion in software design.

Adhesion is the attraction between two molecules of different substances.cohesion is the attraction between molecules of the same substances.

Adhesion is the attraction between different substances, like glass and water. Cohesion is the attraction between molecules of the same substance.

Adhesion is the attraction between two molecules of different substances.cohesion is the attraction between molecules of the same substances.hope i helped......

Cohesion is the attraction between like molecules (such as water to water), while adhesion is the attraction between unlike molecules (such as water to any surface).

In capacitive coupling, there is usually a dielectric between the electrodes, whereas in inductive coupling, the plasma is created by a magnetic field with a coil. Capacitive coupling is used for low power, low density, and high plasma potential. And inductive coupling is used for high power, high density, low plasma potential.

You will have two coupling constants, Ja and Jb.  Ja is the frequency difference between the CENTERS of the TWO DOUBLETS.  Jb is the frequency difference between the TWO PEAKS in a SINGLE DOUBLET.

There is no difference. A capacitor is a capacitor. The difference is just in the value, polarity (if there is any), and use.

A coupling is a threaded or soldered solid fitting, a union is a fitting that joins two pipes and can be taken apart with wrenches.

half coupling used to take branch from header ie: 2" header to 3/4' branch. where full coupling used to connect to straight pipe. ie: 2" to 2" pipe connection.

RC COUPLING :- is the most Commonly used Coupling Between the two stages of a cascaded or multistage amplifier because it is cheaper in cost and Very compact circuit and provides excellent frequency response. TRANSFORMER COUPLING :- Impedence Coupling results in more efficient amplification because no signal power is wasted in Inductor L. Such Coupling has the drawback of being larger, Heavier and Costlier than the RC COUPLING. Impedence Coupling is rarely used beyond audio range . by : Muhammad zubair.... muet student of telecom.

A structured program is not OO, yet still exhibits low coupling and high cohesion.

Cohesion is an attraction between molecules of the same substance.

Friction is due to resistance between two solid surfaces where viscosity is due to cohesion or adhesion between two liquid surfaces.

mechanical coupling can be called as a mechanical device which is used to connect two mechanical links as well as transmit power between them. mechanical joint is just used to joint two linkages . there is no power or torque transmission between them .

Conduit pipe is for wire. Seamless pipe means you need a coupling to connect them.

The word cohesion is a noun, meaning the characteristic of sticking together. Cohesive is an adjective, meaning tends to stick together. So, these words convey a similar idea, but have different grammatical functions.

clutch means group of people that is closely packed together but coupling means engage in sexual intercourse .

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