Q3: Data Abstraction and Java Objects Quiz

What is a class in Java?

• A blueprint for creating objects

• A method for defining behavior

• A loop for iteration

• A variable for storing data

What is the purpose of data abstraction?

• To make data accessible to unauthorized users

• To complicate the code structure

• To hide data from the viewer

• To expose all data to everyone

What is the relationship between a class and an object?

• A class and an object are the same thing

• A class cannot create objects

• An object is an instance of a class

• A class is an instance of an object

What does the 'state' of an object represent?

• The unique identifier of the object

• The functionality of the object

• The data associated with the object

• The relationship between objects

What does the 'behavior' of an object refer to?

• The identity of the object

• The functionality of the object

• The size of the object

• The color of the object

What does the 'identity' of an object allow us to do?

• Create a new object from a class

• Change the state of the object

• Compare two objects for equality

• Access the behavior of the object

What is the process of creating an object from a class called?

• Polymorphism

• Inheritance

• Abstraction

• Instantiation

What is the main benefit of using objects in a program?

• Limited functionality and flexibility

• Improved organization and reusability of code

• Decreased reusability of code

• Increased complexity of the code

What is the purpose of a class in object-oriented programming?

• To limit the functionality of an object

• To create instances of objects

• To define the behavior of an object

• To store data for an object

What is the role of a class in data abstraction?

• To expose all data to the viewer

• To encapsulate and hide data from the viewer

• To complicate the code structure

• To limit the functionality of an object