Object Oriented Programming With Real World Scenario. Normally every interviewer ask for a real world scenario explaining OOP and many of them fail to answer. This is the reason I am writing this article. This article is mainly intended for the audience who are knowing the Object Oriented Programming OOP concept theoretically but are unable to link with real world programming world. We write programs to solve our problem and get our work done. Object Oriented Programming is basically considered as design methodology for creating a non rigid application. CMSImages/916_Java%20inheritance%20hierarchy.png' alt='Write A Program For Multilevel Inheritance' title='Write A Program For Multilevel Inheritance' />In OOPS every logic is written to get our work done, but this is done based on entity which we call it as Objects. OOP allow us to decompose our problem in to small unit of work which are accessed via Objects. Write A Program For Multilevel Inheritance' title='Write A Program For Multilevel Inheritance' />13. Refine the student manager program to manipulate the student information from files by using the DataInputStream and DataOutputStream. Assume suitable data. C2952, 9. 691 Cband C c contact c CMACCS,Centre for Mathematical Modelling and Computer Simulation. The capability of a class to derive properties and characteristics from another class is called Inheritance. Inheritance is one of the most important feature of. In an white paper titled Java an Overview by James Gosling in February 1995 gives an idea on why multiple inheritance is not supported in Java. JAVA omi. This course is designed to provide an overview on epidemiology and the Internet for medical and health related students around the world based on the concept of. Illegal pyramid scams, MLM schemes, binary compensation, multilevel marketing scams such as chain letters, downline based moneymaking opportunity fraud. Types of Inheritance in C. Inheritance, Single, Multilevel, Multiple, Heirarchical and Hybrid. We build function around this objects. There are mainly four pillars features of OOP. If all this features fulfill our programming, then we can say it as perfect Object Oriented Programming. Abstraction Encapsulation. Inheritance. Polymorphism. Lets consider an example for explaining each pillar, which at the end will make you understand follow Object Oriented Programming. Before that, we need to know something. When we take a mobile as an object, its basic functionality for which it was invented were Calling Receiving a call Messaging. But now a days thousands of new features models were added the count is still increasing. In above diagram, each brand Samsung, Nokia, IPhone have their own list of features along with basic functionality of dialing, receiving a call messaging. When we talk about OOP, as the word indicate it will talk about an object a real world objectObjects. Any real world entity which can have some characteristics or which can perform some work is called as Object. This object is also called as an instance i. If we consider the above example, a mobile manufacturing company, at a time manufactures lacs of pieces of each model which are actually an instance. This objects are differentiated from each other via some identity or its characteristics. This characteristics is given some unique name. Mobile mbl. 1  new Mobile   Mobile mbl. Mobile   Class A Class is a plan which describes the object. We call it as a blue print of how the object should be represented. Mainly a class would consist of a name, attributes operations. Considering the above example, A Mobile can be a class which has some attributes like Profile Type, IMEI Number, Processor, and some more. Dial, Receive Send. Message. There are some OOPS principle that need to be looked in while creating any of the class. Cms Software For Dvr Free Download. This principle is called as SOLID where each letter has some specification. I wont be going into this points deeper. A single line of each explanation may clear you with some points. SRP The Single Responsibility Principle A class should have one, and only one responsibility. OCP The Open Closed Principle You should be able to extend a classes behavior, without modifying it. Inheritance LSP The Liskov Substitution Principle Derived classes must be substitutable for their base classes. PolymorphismISP The Interface Segregation Principle Make fine chopped interface instead of huge interface as client cannot be forced to implement an interface which they dont use. DIP The Dependency Inversion Principle Depend on abstractions, not on concretions. AbstractionNow this class is represented as shown belowpublic class Mobile         private string IEMICode  get set        public string SIMCard  get set        public string Processor  get        public int Internal. Memory  get        public bool Is. Single. SIM  get set          public void Get. IEMICode                  Console. Write. LineIEMI Code  IEDF3. Dial                  Console. Write. LineDial a number              public void Receive                  Console. Write. LineReceive a call              public virtual void Send. Message                  Console. Write. LineMessage Sent            Abstraction. Abstraction says, only show relevant details and rest all hide it. This is most important pillar in OOPS as it is providing us the technique to hide irrelevant details from User. If we consider an example of any mobile like Nokia, Samsung, IPhone. Some features of mobiles. Dialing a number call some method internally which concatenate the numbers and displays it on screen but what is it doing we dont know. Clicking on green button actual send signals to calling persons mobile but we are unaware of how it is doing. This is called abstraction where creating method which is taking some parameter returning some result after some logic execution without understating what is written within the methodpublic void Dial              Console. Write. LineDial a number    Encapsulation. Encapsulation is defined as the process of enclosing one or more details from outside world through access right. It says how much access should be given to particular details. Both Abstraction Encapsulation works hand in hand because Abstraction says what details to be made visible Encapsulation provides the level of access right to that visible details. It implements the desired level of abstraction. Talking about Bluetooth which we usually have it in our mobile. When we switch on the Bluetooth I am able to connect another mobile but not able to access the other mobile features like dialing a number, accessing inbox etc. This is because, Bluetooth feature is given some level of abstraction. Another point is when mobile A is connected with mobile B via Bluetooth whereas mobile B is already connected to mobile C then A is not allowed to connect C via B. This is because of accessibility restriction. This is handled by access specifier like public, private, protected, and internalprivate string IMEICode  7. Polymorphism. Polymorphism can be defined as the ability of doing the same operation but with different type of input. More precisely we say it as many forms of single entity. This play a vital role in the concept of OOPS. Lets say Samsung mobile have the 5. MP camera available i. Camera. Click. Now same mobile is having Panorama mode available in camera, so functionality would be same but with mode. This type is said to be Static polymorphism or Compile time polymorphism. See the example below public class Samsumg  Mobile        public void Get. WIFIConnection                Console. Write. LineWIFI connected                    public void Camera. Click                Console. Write. LineCamera clicked                    public void Camera. Clickstring Camera. Mode                Console. Write. LineCamera clicked in   Camera. Mode   Mode          Compile time polymorphism the compiler knows which overloaded method it is going to call. Compiler checks the type and number of parameters passed to the method and decides which method to call and it will give an error if there are no methods that matches the method signature of the method that is called at compile time. Another point where in Send. Message was intended to send message to single person at a time but suppose Nokia had given provision for sending message to a group at once. Overriding the functionality to send message to a group. This type is called Dynamic polymorphism or Runtime polymorphism.