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Rapid Application Development (RAD) is a software development life-cycle designed to give; much faster development and higher-quality results than those achieved with the traditional life-cycle High speed, High quality, low lost are the three main goals of rapid application development. We use RAD to Takes advantage of automated tools and techniques because it allows organizations to build software applications faster, better, and cheaper. RAD Model The process of writing the software itself involves the planning required for developing the product is known as Rapid Application Development Model. It consist main five phases. Business Modeling In here information flow among business functions is defined. That means the complete business analysis is done to understand the business. Business functions are defined by answering questions like what information drives the business process, what information is generated and who generated it, where does the info

today we are going to study about OOP concepts. Object oriented programming language is based on the concept of objects. Object oriented concepts are, Object Class Inheritance Polymorphism Encapsulation object an entity which has state(properties) and behavior is known as an object. it may be anything and may be logical or physical.Object is an instance of a class. ex :- dog,pen,tree,car,mother,...etc. as we told state and behavior let's discuss it with an example class class is a blue print or template of object. Which is a group of objects have similar properties. inheritance when one object acquires all or some properties of another object it is inheritance. That may the child will acquire their parents properties. as an example let's take the supper class as vehicle. A vehicle has colour,brand,speed,auto/manual etc. Car may be a sub class of above supper class. That means car has common properties in vehicle class and there may

We all know operating systems are designed to help us in normal tasks which done by a compute such as Managing files, Loading programs, Printing documents etc. But developers are creating new programs to enhance or extend the operating system’s capabilities. Those are calls utility software. Simply utility programs provide new features which are not supported by an operating system. Now there are thousands of different utility software and we can find them on internet for free or with little price. Although we cannot take a definite list of utility software categories some common types are, Disk and file management programs Internet security Op customization tools Antivirus utilities A virus is a parasitic, scramble files or replicate itself until the host disk is full. Viruses can be transmitted in numerous ways such as while transforming files from one to another, downloading files over the internet or reusing old diskettes etc. So we use antiv