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Questions and Answers
What is a class?
What is a class?
A user-defined data type that acts as a blueprint for creating objects.
What are the two main components of a class?
What are the two main components of a class?
Attributes and methods.
Classes occupy memory until an object is created.
Classes occupy memory until an object is created.
False
What defines the state of an object?
What defines the state of an object?
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Explain the concept of an object.
Explain the concept of an object.
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What are the three main components visualizing a class?
What are the three main components visualizing a class?
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What is the purpose of a class in programming?
What is the purpose of a class in programming?
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What is an attribute in the context of a class?
What is an attribute in the context of a class?
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What is a method in the context of a class?
What is a method in the context of a class?
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Study Notes
Classes
- A class is a user-defined data type that serves as a blueprint for creating objects.
- Encapsulates attributes (data) and methods (functions) related to an object.
- Attributes hold the state of an object, while methods define its behavior.
- Memory is allocated only when an object is instantiated from the class.
Objects
- An object is an instance of a class, created based on the class definition.
- Holds specific data that conforms to the structure defined by its class.
- Unique values for attributes can be assigned to each object, resulting in distinct identities.
- Key characteristics include state (defined by attributes), behavior (actions/methods), and identity (uniqueness).
Class Structure
- Visualized as a three-compartment box containing:
- Class Name (identifier): Represents the class.
- Data Members (attributes): Static attributes of the class.
- Member Functions (methods): Dynamic operations of the class.
C++ Class Example
- Example class definition:
class Car { public: string brand; string model; int year; void start() { cout << "Car started"; } }; - Demonstrates encapsulation of data members and member functions, aiding in code organization and reusability.
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Description
This quiz covers the fundamentals of Object Oriented Programming, focusing on the concepts of classes, objects, and constructors. Test your understanding of these key principles that form the foundation for creating and manipulating data in software development.
