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Java Classes and Objects

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Questions and Answers

What is a class in object-oriented programming?

An instance of an object

A logical entity

A collection of methods

A template for objects (correct)

What is an object in object-oriented programming?

A logical entity

A template for classes

A collection of methods

An instance of a class (correct)

Do classes consume space in memory?

Yes, classes occupy memory space

No, classes are logical entities (correct)

Classes consume space only when instantiated

Classes are not related to memory allocation

Can a class exist without an object in object-oriented programming?

Yes, a class can exist without an object Signup and view all the answers

An object is an instance of a class.

True Signup and view all the answers

A class is a physical entity that occupies space in memory.

False Signup and view all the answers

When individual objects are created, they inherit all the variables and methods from the class.

True Signup and view all the answers

A class can exist without an object, but an object cannot exist without a class.

True Signup and view all the answers

Study Notes

Classes and Objects in Object-Oriented Programming

A class is a blueprint or a template that defines the properties and behavior of an object.
An object is an instance of a class, and it represents a real-world entity or concept.
Classes do not consume space in memory, as they are just templates or blueprints.
A class can exist without an object, but an object cannot exist without a class.
When an object is created, it inherits all the variables and methods from the class.
An object is a specific instance of a class, with its own set of attributes and actions.
Classes define the structure and behavior of objects, but objects are the actual instances that occupy space in memory.

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Description

Explore the concepts of classes and objects in Java, and understand how they define the structure and behavior of objects. Learn about the attributes and methods associated with classes, and how objects inherit them when created. Dive into the relationship between classes and objects, and grasp the essence of object-oriented programming in Java.