Class in Programming: Quiz & Flashcards

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Questions and Answers

What is the primary purpose of defining a class?

To define a blueprint or template for a data type (correct)

To create an actual instance of data

To specify the operations that can be performed on the class itself

To inherit properties and methods from a base class

What does the `Partial` keyword signify in a class definition?

It allows the class to inherit from multiple base classes

It indicates that the class is an abstract class

It indicates that the class is incomplete and must be combined with another partial definition (correct)

It specifies that the class can only have partial access to its members

Which of the following statements about objects is true?

Objects define the members of a class

Objects are the same as classes

Objects are blueprints for a class

Objects are instances of a class (correct)

What is the purpose of the `MustInherit` keyword in a class definition?

It specifies that the class can only be used as a base class and cannot be instantiated directly Signup and view all the answers

Which keyword is used to specify the base class that a class inherits from?

<code>Inherits</code> Signup and view all the answers

Which of the following access modifiers allows a class member to be accessible only within the class itself?

<code>Private</code> Signup and view all the answers

What does the 'Shadows' keyword indicate in a class definition?

It specifies that the class redefines an existing element in a base class. Signup and view all the answers

What is the purpose of the 'NotInheritable' keyword in a class definition?

To restrict the class from being used as a base class. Signup and view all the answers

How does the 'Partial' keyword affect a class definition?

Implies a partial definition of the class. Signup and view all the answers

What does it mean if a class is defined with 'MustInherit' keyword?

The class can only be used as a base class and cannot be instantiated directly. Signup and view all the answers

Which keyword in a class definition specifies the base class it is inheriting from?

'Inherits' Signup and view all the answers

What is the significance of 'accessmodifier' in a class definition?

Its purpose is to define the access levels of the class members. Signup and view all the answers

What does encapsulation in object-oriented programming refer to?

Hiding the implementation details of a class and exposing only necessary information Signup and view all the answers

In the given code, what is the purpose of the 'setLength', 'setBreadth', and 'setHeight' functions in the Box class?

To set the values of length, breadth, and height respectively Signup and view all the answers

What is a member function in a class?

A function that operates on any object of the class and has access to all members of the class Signup and view all the answers

What does a public member function allow in a class?

Access to private member variables Signup and view all the answers

Which feature of object-oriented programming helps in ensuring that class attributes are accessed through public member functions only?

Encapsulation Signup and view all the answers

How does a member variable differ from a member function in a class?

Member variables store data for an object, while member functions operate on the data. Signup and view all the answers

Study Notes

Class Definition

A class is a blueprint for a data type that defines what an object of the class will consist of and what operations can be performed on it.
A class definition starts with the keyword Class followed by the class name and ends with the End Class statement.
Class definition can include access modifiers, inheritance, interfaces, and other attributes.

Class Members

Members of a class are variables and methods that constitute the class.
Members can be data members (variables) or function members (methods).

Class Instantiation

Objects are instances of a class.
Objects can be declared and initialized using the New keyword.

Access Modifiers

Access modifiers define the access levels of a class or its members.
Access modifiers include Public, Protected, Friend, Protected Friend, and Private.

Inheritance

A class can inherit from a base class using the Inherits keyword.
The MustInherit keyword specifies that a class can be used only as a base class and not instantiated directly.
The NotInheritable keyword specifies that a class cannot be used as a base class.

Interfaces

A class can implement interfaces using the Implements keyword.
Interfaces define a contract that must be implemented by the class.

Encapsulation

Encapsulation is a concept where member variables are kept private and accessed through public member functions.
Member functions operate on an object of the class and have access to all members of the class for that object.

Member Functions

Member functions are functions that have their definition or prototype within the class definition.
Member functions can operate on any object of the class and have access to all members of the class for that object.

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Description

Learn about defining a class as a blueprint for a data type, understanding what an object of the class consists of and the operations that can be performed on it, and how objects are instances of a class.

Class Definition in Programming

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