OOP Basic Concepts

What is a Class in object-oriented programming?

• A class is a loop in object-oriented programming

• A class is a variable in object-oriented programming

• A class is a blueprint for creating objects.

• A class is a function in object-oriented programming

Define an Object in the context of OOP.

• An object is a variable in programming

• An object is an instance of a class that encapsulates data and behavior.

• An object is a loop in OOP

• An object is a function in OOP

Explain the concept of Encapsulation in OOP.

• Encapsulation is a process of inheritance in OOP

• Encapsulation is not related to data hiding in OOP

• Encapsulation in OOP refers to bundling data and methods into a single unit (class), enabling data hiding and abstraction.

• Encapsulation involves exposing all class members publicly

What is meant by Inheritance in object-oriented programming?

• Inheritance is a process where a class inherits properties from multiple classes

• Inheritance is a feature that allows classes to inherit properties from subclasses

• Inheritance is only applicable to abstract classes in object-oriented programming

• Inheritance in object-oriented programming allows a new class to inherit properties and behaviors from an existing class.

Describe the concept of Polymorphism in OOP.

• Polymorphism is only applicable to a single class in OOP

• Polymorphism refers to the ability of objects to change their data types

• Polymorphism is the same as Inheritance in OOP

• Polymorphism in OOP is the ability of different objects to respond to the same message in different ways.

How is Abstraction defined in the context of OOP?

• Abstraction in OOP only focuses on unnecessary details and ignores essential features.

• Abstraction in OOP simplifies complex systems by hiding unnecessary details and highlighting essential features.

• Abstraction in OOP makes systems more complex by highlighting unnecessary details and hiding essential features.

• Abstraction in OOP has no impact on system design and functionality.

What is the purpose of a Class in OOP?

• To serve as a placeholder for data

• To handle network requests

• To act as a blueprint for creating objects

• To define the user interface

How does Inheritance promote code reusability?

• Inheritance promotes code reusability by requiring classes to redefine all attributes and methods.

• Inheritance promotes code reusability by allowing classes to inherit attributes and methods from other classes.

• Inheritance promotes code reusability by restricting access to attributes and methods.

• Inheritance promotes code reusability by duplicating code instead of reusing it.

Which keyword is used to allocate memory dynamically in java.

• class

• new

• object

• encapsulation

Which of the following is not an object oriented principle.

• encapsulation

• class

• Multithreading

• polymorphism