Polymorphism in Programming
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Questions and Answers

What determines which method is called in method overloading?

  • The return type of the method
  • The name of the method
  • The accessibility of the method (public or private)
  • The number and types of parameters passed to it (correct)

    • What is an example of function polymorphism in Python?

  • The `sort()` function (correct)
  • The `range()` function
  • The `len()` function
  • The `print()` function

    • What is the purpose of type parameters in parametric polymorphism?

  • To specify the exact data type
  • To provide a default value for the function
  • To act as placeholders for specific types (correct)
  • To restrict the function to only work with primitive types

    • What is the result of operator overloading?

    <p>Operators can be redefined for user-defined types</p> Signup and view all the answers

    What is the main difference between method overloading and function polymorphism?

    <p>Method overloading is used for methods with different parameter lists, while function polymorphism is used for functions with different argument types</p> Signup and view all the answers

    What is the benefit of parametric polymorphism?

    <p>It allows a function or method to work with different data types without explicit type casting</p> Signup and view all the answers

    Study Notes

    Polymorphism

    Method Overloading

    • Method overloading is a type of polymorphism where multiple methods with the same name can be defined, but with different parameter lists.
    • The method to be called is determined by the number and types of parameters passed to it.
    • Method overloading allows for more flexibility in programming, as it enables the same method name to be used for different operations.
    • Example: print(int x), print(double x), print(string s)

    Function Polymorphism

    • Function polymorphism is a type of polymorphism where a function can be called with different types of arguments.
    • The function can behave differently depending on the type of argument passed to it.
    • Function polymorphism is achieved through function overloading or generic functions.
    • Example: sort() function in Python, which can sort lists, tuples, or other iterable objects.

    Parametric Polymorphism

    • Parametric polymorphism is a type of polymorphism where a function or method can work with different data types, without explicit type casting.
    • It is achieved through the use of type parameters, which are placeholders for specific types.
    • Example: swap<T>(T x, T y) function in C++, which can swap values of any type T.

    Operator Overloading

    • Operator overloading is a type of polymorphism where operators such as +, -, *, etc. can be redefined for user-defined types.
    • Operator overloading allows for more intuitive and natural-looking code, as it enables the use of operators on objects of custom classes.
    • Example: Vector class in C++, which overloads the + operator to perform vector addition.

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    Description

    Learn about the different types of polymorphism in programming, including method overloading, function polymorphism, parametric polymorphism, and operator overloading. Understand how they enable more flexible and intuitive coding.

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