Mastering Object Oriented Programming

What is a class in object-oriented programming?

• A class is a type of variable that stores data.

• A class is a function that executes code.

• A class is a blueprint for creating objects that defines attributes and methods.

• A class is a method that performs calculations.

Define an object in the context of OOP.

• An object is a type of variable that holds a single value.

• A class is a blueprint for creating objects.

• An object is a function that performs actions in OOP.

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

Explain the concept of inheritance in OOP.

• Inheritance allows a class to inherit only methods, not attributes.

• Inheritance is used to create interfaces in OOP.

• Inheritance allows a subclass to inherit attributes and methods from a superclass, promoting code reuse and establishing a class hierarchy.

• Inheritance is a method to delete classes in OOP.

What is the purpose of polymorphism in programming?

• To restrict method access to private members only.

• To improve the performance of code execution.

• To enable multiple inheritance in classes.

• The purpose of polymorphism in programming is to allow for methods to operate on objects of different classes through a common interface.

Describe encapsulation and its importance in OOP.

• Encapsulation is primarily used to improve the performance of an application.

• Encapsulation is the process of combining multiple classes into one single class.

• Encapsulation is the principle of restricting access to an object's internal state and requiring all interaction to occur through well-defined interfaces, which enhances data protection and modularity.

• Encapsulation allows direct access to an object's internal state for easier manipulation.

What is abstraction in programming?

• Abstraction refers to the process of debugging code.

• Abstraction is a programming principle that simplifies complex systems by exposing only the essential features and hiding the details.

• Abstraction is a technique to write more lines of code.

• Abstraction is a method to increase the performance of a program.

Differentiate between an interface and an abstract class.

• An interface is a contract with no implementation, allowing multiple inheritance; an abstract class can have some implementation and supports single inheritance.

• An interface can only be inherited by one class; an abstract class can be implemented by multiple classes.

• An interface can have implementation and supports multiple inheritance; an abstract class is a contract with no implementation.

• An interface can contain fields and properties; an abstract class cannot have any fields.

How does inheritance promote code reusability?

• Inheritance promotes code reusability by allowing new classes to use and extend existing class functionality.

• Inheritance requires all classes to be abstract.

• Inheritance allows classes to be completely independent.

• Inheritance restricts the use of existing class methods.

What are the benefits of using polymorphism?

• Reduced performance due to overhead

• Limited compatibility with other programming paradigms

• Increased complexity in code

• The benefits of using polymorphism include code reusability, flexibility, easier maintenance, and scalability.

Explain how encapsulation can enhance security in software.

• Encapsulation enhances security by restricting access to sensitive data and methods, reducing the risk of unauthorized interactions.

• Encapsulation allows all data to be publicly accessible.

• Encapsulation increases the complexity of the code, making it easier to understand.

• Encapsulation has no impact on the security of the software.