Object Oriented Programming - Essay Example

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Traditionally, a computer program was seen as a collection of functions or procedures or simply a list of instructions whereas with the advent of Object Oriented programming, each program may be seen as comprising a collection of individual units, or objects, that act on each other…
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Download file to see previous pages OOP is an acronym for Object Oriented Programming. Traditionally, a computer program was seen as a collection of functions or procedures or simply a list of instructions whereas with the advent of Object Oriented programming, each program may be seen as comprising a collection of individual units, or objects, that act on each other. In simpler terms, it is a type of programming in which programmers define not only the data type of a data structure, but also the types of operations (functions) that can be applied to the data structure. In this way, the data structure becomes an object that includes both data and functions. In addition, programmers can create relationships between one object and another. Each object is capable of receiving messages, processing data and sending messages to other objects. One of the principal advantages of object oriented programming techniques over procedural programming techniques is that they enable programmers to create modules that do not need to be changed when a new type of object is added. A programmer can simply create a new object that inherits many of its features from existing objects. This makes object-oriented programs easier to modify. Thus, it creates greater flexibility and maintainability in programming, and so is widely used in large-scale software engineering....
-> Reuse: Software reuse is another characteristics of object oriented design. One of the

major ways to achieve software reuse is through inheritance.

->Inheritance: Inheritance is the mechanism for creating sub-classes, it provides a way to

define a (sub) class as a specialization or an extension of a more general class or parent

class. An object in a sub class inherits all the attributes of the parent and might have

additional attributes and behaviors. The basic advantage of inheritance is that it provides

reusability, like, adding additional features to an existing class without modifying it.

-> Polymorphism: It is the concept which states that the same operation may apply to two

or more classes in different way. It is the behavior which varies depending on the class in

which the behavior is invoked, that is, two or more classes can react differently to the

same message. The essence of this concept is that every class should handle different data

types.
Thus, Object oriented programming provides a clear modular structure

for programs which makes it good for defining abstract datatypes where implementation

details are hidden and the unit has a clearly defined interface.


DSDM

Dynamic Systems Development Method is abbreviated as DSDM. DSDM provides a

framework for an iterative and incremental approach to the development of Information

Systems. In simpler terms, it is a framework of controls for the development of IT

systems to tight time scales. It is independent of any particular set of tools and techniques

and can be used with object-oriented and structured analysis and design approaches. ...Download file to see next pagesRead More
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