C++ Class Basics Quiz
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C++ Class Basics Quiz

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Questions and Answers

What are the variables declared within a class called?

  • Functions
  • Attributes (correct)
  • Methods
  • Instances

    • Which symbol is used to end a class definition in C++?

  • .
  • ; (correct)
  • ==
  • :

    • What must be specified to create an object of a class in C++?

  • Function name followed by object name
  • Variable type followed by class name
  • Object name followed by class name
  • Class name followed by object name (correct)

    • How do you access the attributes of a class using an object?

    <p>Using the dot syntax (.)</p> Signup and view all the answers

    In the given code, which data type is 'myNum' declared as?

    <p>Integer</p> Signup and view all the answers

    What is the primary role of a class in C++?

    <p>To define a blueprint for creating individual objects.</p> Signup and view all the answers

    Which keyword is used to create a class in C++?

    <p>class</p> Signup and view all the answers

    What does the 'public' access specifier allow in a class?

    <p>It makes class members accessible from outside the class.</p> Signup and view all the answers

    In the MyClass example, which of the following is NOT an attribute?

    <p>drive</p> Signup and view all the answers

    What defines a class member in C++?

    <p>Variables and functions that belong to a class.</p> Signup and view all the answers

    Study Notes

    Overview of C++ Language

    • C++ is an object-oriented programming (OOP) language where everything revolves around classes and objects.
    • Objects have attributes (data members) and methods (functions).

    Classes and Objects

    • A class serves as a user-defined data type; it acts as a blueprint to create objects.
    • Example of creating a class:
      • Use the class keyword.
      • Define public access for members.
      • Attributes can be defined (e.g., int myNum, string myString).

    Access Specifiers

    • Access specifiers define the visibility of class members.
    • The public specifier allows access to class members from outside the class.

    Creating an Object

    • An object is instantiated using the class as a template.
    • Use the class name followed by the object name to create an object.
    • Accessing attributes is done via the dot syntax (e.g., myObj.myNum).

    Member Functions

    • Functions defined within a class are called member functions.
    • Member functions can access class attributes directly.

    Constructors

    • A constructor initializes object attributes upon creation.
    • Types of constructors include:
      • Default Constructor: No parameters.
      • Parameterized Constructor: Accepts arguments to initialize attributes.
      • Copy Constructor: Initializes a new object as a copy of an existing object.

    Destructor

    • A destructor is invoked when an object goes out of scope.
    • It cleans up resources or performs necessary final actions.

    Function Overloading

    • Function overloading allows multiple functions with the same name but different parameters within a class.

    Inline Functions

    • Inline functions are expanded in line at compile time to reduce the overhead of function calls.

    this Pointer

    • The this pointer refers to the current object within a member function.

    Friend Functions and Friend Classes

    • A friend function or class can access private and protected members of another class.

    Example Program Structure

    • Begin with #include directives for libraries.
    • Define a class with attributes and methods.
    • Create and manipulate an object in the main function.

    Code Example Summary

    • Creating an object of MyClass and accessing attributes shows practical application of the principles.
    • Example of setting values and printing attributes demonstrates object manipulation in C++.

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    Related Documents

    Gls University Object-Oriented Programming Notes PDF

    Description

    Test your knowledge of C++ class definitions and object-oriented concepts. This quiz will cover key questions about class variables, object instantiation, and attribute access in C++. Perfect for beginners looking to reinforce their understanding of C++ programming.

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