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    IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers
    IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers
    IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers
    Ebook129 pages1 hourIGNOU PGDCA Solved Paper Books Series

    IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers

    By Manish Soni

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    About this ebook

    Welcome to the comprehensive collection of IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers solved papers for the Post Graduate Diploma in Computer Applications (PGDCA) program offered by the Indira Gandhi National Open University (IGNOU). This book is meticulously crafted to assist students in their preparation for the Object-Oriented Programming using Java examination, a fundamental and integral part of the PGDCA curriculum. As technology continues to evolve, Java remains a cornerstone of computer science, playing a pivotal role in software development across diverse platforms. Recognizing the significance of a strong foundation in Java programming, this compilation brings together years of previous exam papers with detailed solutions, providing a valuable resource for students to enhance their understanding and excel in their academic pursuits.

    LanguageEnglish
    PublisherPoorav Publications
    Release dateNov 13, 2024
    ISBN9789348762702
    IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers

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      Book preview

      IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers - Manish Soni

      Preface

      Welcome to the comprehensive collection of IGNOU PGDCA MCS 206 Object Oriented Programming using Java Previous Years solved Papers solved papers for the Post Graduate Diploma in Computer Applications (PGDCA) program offered by the Indira Gandhi National Open University (IGNOU). This book is meticulously crafted to assist students in their preparation for the Object-Oriented Programming using Java examination, a fundamental and integral part of the PGDCA curriculum. As technology continues to evolve, Java remains a cornerstone of computer science, playing a pivotal role in software development across diverse platforms. Recognizing the significance of a strong foundation in Java programming, this compilation brings together years of previous exam papers with detailed solutions, providing a valuable resource for students to enhance their understanding and excel in their academic pursuits.

      Each solved paper within this book is designed to serve as more than just an answer key. Beyond the correct responses, you will find thorough explanations, strategic insights, and helpful tips aimed at aiding your comprehension of Java concepts. Whether you are a novice programmer or a seasoned learner, this collection offers a structured approach to mastering Object-Oriented Programming using Java, covering topics ranging from basic syntax to advanced features. The inclusion of previous years' papers ensures that you are well-acquainted with the examination patterns and can approach your assessments with confidence.

      As you embark on your journey through the PGDCA program, we hope this book proves to be a valuable companion, aiding you in your quest for proficiency in Java. It is our sincere desire that this resource contributes significantly to your academic success, fostering a deeper appreciation for Java programming and its applications in the dynamic world of computer science. Best of luck in your studies and may this book serve as a stepping stone towards a rewarding and fulfilling career in the realm of computer applications.

      Table of Contents

      Preface

      PGDCA December 2021

      PGDCA June 2022

      PGDCA December 2022

      PGDCA December 2021

      POST GRADUATE DIPLOMA IN COMPUTER APPLICATION (PGDCA)

      (NEW) Term-End Examination

      December, 2021

      MCS-206

      OBJECT ORIENTED PROGRAMMING USING JAVA

      1. (a) What is Object Oriented Programming? What is an object? How is it created in Java? Explain with the help of an example.

      Ans- Object-Oriented Programming (OOP) is a programming paradigm that revolves around the concept of objects. It is a way of designing and organizing code to promote modularity, reusability, and a clear structure. In OOP, software is structured as a collection of objects, each representing an instance of a class.

      An object, in the context of OOP, is a self-contained unit that consists of data (attributes) and the methods (functions) that operate on that data. Objects are instances of classes, which are blueprints or templates defining the structure and behavior of the objects.

      In Java, objects are created using the new keyword to instantiate a class. Here's an example to illustrate the concept:

      // Define a simple class called Car

      class Car {

      // Attributes

      String brand;

      String model;

      int year;

      // Constructor to initialize the object

      public Car(String brand, String model, int year) {

      this.brand = brand;

      this.model = model;

      this.year = year;

      }

      // Method to display information about the car

      public void displayInfo() {

      System.out.println(Brand: + brand);

      System.out.println(Model: + model);

      System.out.println(Year: + year);

      }

      }

      public class Main {

      public static void main(String[] args) {

      // Create an object of the Car class

      Car myCar = new Car(Toyota, Camry, 2022);

      // Access the object's attributes and methods

      myCar.displayInfo();

      }

      }

      In this example, we have a Car class with attributes (brand, model, year) and a method (displayInfo) to print information about the car. In the main method, we create an instance of the Car class called myCar using the new keyword. We then access the object's attributes (brand, model, year) and call the displayInfo method to print details about the car. This demonstrates the fundamental concepts of OOP, where the Car class serves as a blueprint for creating individual objects representing specific cars with unique characteristics.

      (b) Explain use of super keyword in Java programming with the help of an example.

      Ans- The super keyword in Java is used to refer to the immediate parent class object or invoke the parent class's methods and constructors. It is often used in scenarios where a subclass wants to access or override a method or field defined in its superclass. Here's an example to illustrate the use of the super keyword:

      // Parent class (Superclass)

      class Animal {

      // Method in the parent class

      public void eat() {

      System.out.println(Animal is eating);

      }

      }

      // Child class (Subclass) inheriting from Animal

      class Dog extends Animal {

      // Method in the child class, overriding the eat method in the parent class

      @Override

      public void eat() {

      // Use of 'super' to invoke the eat method of the parent class

      super.eat();

      System.out.println(Dog is eating);

      }

      // New method in the child class

      public void bark() {

      System.out.println(Dog is barking);

      }

      }

      public class Main {

      public static void main(String[] args) {

      // Create an object of the child class

      Dog myDog = new Dog();

      // Call the eat method of the child class, which invokes the eat method of the parent class using 'super'

      myDog.eat();

      // Call the bark method of the child class

      myDog.bark();

      }

      }

      In this example, we have a Animal class with an eat method. The Dog class extends the Animal class and overrides the eat method. Inside the overridden eat method of the Dog class, the super.eat() statement is used to invoke the eat method of the parent class before executing the

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