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Questions and Answers
What is a class in object-oriented programming?
What is a class in object-oriented programming?
- A specific occurrence of an object
- A compile time feature
- A member function or method
- A program-code-template for creating objects (correct)
What are instance variables in object-oriented programming?
What are instance variables in object-oriented programming?
- Variables of type Class
- Variables declared at run-time
- Member variables specific to an object (correct)
- Variables shared across the class
In certain languages, classes are only a compile time feature. What does this mean?
In certain languages, classes are only a compile time feature. What does this mean?
- Classes are immutable
- Classes are created during run-time
- New classes cannot be declared at run-time (correct)
- Classes are dynamically typed
What is an instance in object-oriented programming?
What is an instance in object-oriented programming?
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What is a metaclass in object-oriented programming?
What is a metaclass in object-oriented programming?
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Study Notes
Classes in Object-Oriented Programming
- A class is a blueprint or a template that defines the characteristics and behaviors of an object
- It defines the properties and methods of an object
Instance Variables
- Instance variables are data members of a class that are defined inside the class but outside any method
- Each instance of the class has its own copy of the instance variables
Classes as a Compile-Time Feature
- In certain languages, classes are only a compile-time feature, meaning they are only used during the compilation process
- The class definition is not included in the generated code, and only the resulting object code is used at runtime
Instances
- An instance is an object that is created from a class, with its own set of attributes and methods
- Each instance has its own unique set of values for its instance variables
Metaclasses
- A metaclass is a class that creates classes, allowing customization of the class creation process
- Metaclasses are classes whose instances are classes
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