Tiêu đề Exam Based Qns with Ans.pdf ✅

Advance Java BCA 6 th Semester EXAM BASED QUESTIONS WITH ANSWERS 1. Define inheritance. Discuss the benefits of using inheritance. Discuss multiple inheritance with suitable example.(1+2+7) Inheritance in Java Inheritance is a fundamental concept in object-oriented programming (OOP) that allows a new class (subclass or child class) to inherit properties and behaviors (fields and methods) from an existing class (superclass or parent class). This concept promotes code reusability and establishes a natural hierarchy between classes. Benefits of Using Inheritance 1. Code Reusability: Inheritance allows you to reuse existing code from a parent class, reducing redundancy and improving maintainability. 2. Method Overriding: It enables a subclass to provide a specific implementation of a method that is already defined in its parent class. 3. Polymorphism: Inheritance facilitates polymorphism, where a subclass can be treated as an instance of its parent class, allowing for more flexible and dynamic code. 4. Extensibility: You can extend existing classes to create new functionality without modifying the original class. 5. Modularity: Inheritance encourages a modular approach to program design, making code easier to manage and understand. 6. Data Abstraction: It helps in achieving data abstraction by allowing the use of general classes that can be specialized into more specific classes. 7. Maintenance: Enhancements and bug fixes in a parent class automatically propagate to all subclasses, simplifying maintenance. Multiple Inheritance in Java Java does not support multiple inheritance directly through classes to avoid the complexity and ambiguity that arises from the "Diamond Problem." However, Java allows multiple inheritance through interfaces.