Operator Overloading – MCQs

1. : What is operator overloading in C++?
(A) Assigning a new meaning to an existing operator
(B) Creating a new operator
(C) Changing the syntax of C++
(D) Modifying built-in data types

2. : Which keyword is used to overload an operator in C++?
(A) overload
(B) operator
(C) override
(D) function

3. : Which of the following operators cannot be overloaded in C++?
(A) +
(B) []
(C) ::
(D) =

4. : What type of function is typically used for operator overloading?
(A) Constructor
(B) Member function or friend function
(C) Virtual function
(D) Pure virtual function

5. : Which operator must be overloaded as a class member function?
(A) =
(B) +
(C) *
(D) <<

6. : Can we overload the function call operator ()?
(A) No
(B) Only for integers
(C) Yes
(D) Only in templates

7. : What does overloading the == operator allow?
(A) Redefining how two objects are compared for equality
(B) Adding two objects
(C) Assigning values to objects
(D) None of the above

8. : Which operator is generally overloaded as a friend function?
(A) =
(B) <<
(C) ()
(D) []

9. : What is the return type of an overloaded assignment operator?
(A) void
(B) bool
(C) reference to the class
(D) pointer to the class

10. : Can we overload the [] operator?
(A) Yes
(B) No
(C) Only in templates
(D) Only with friend functions

11. : Which of the following can be overloaded?
(A) . (dot)
(B) sizeof
(D) new

12. : Which operator is overloaded for input stream extraction?
13. : How many arguments does a unary operator function take?
(A) None
(B) One
(C) Two
(D) Three

14. : What is the syntax to define an overloaded operator as a member function?
(A) returnType operator op(parameterList)
(B) returnType overload op(parameterList)
(C) function operator(parameterList)
(D) void op(parameterList)

15. : What does overloading the << operator allow?
(A) Input from console
(B) Output to console
(C) File reading
(D) File writing

16. : Can we overload all relational operators in C++?
(A) Yes
(B) No
(C) Only == and !=
(D) Only > and <

17. : Which operator is used to dereference a pointer?
(A) *
(B) &
(D) %

18. : The new and delete operators can be overloaded to:
(A) Create new syntax
(B) Perform custom memory management
(C) Replace constructors
(D) Replace main function

19. : Operator overloading provides:
(A) More than one meaning to an operator
(B) Less readability
(C) Syntax errors
(D) Less memory usage

20. : Can operator overloading improve code readability?
(A) Yes
(B) No
(C) It depends on the operator
(D) Only in templates

21. : Which operator is used to access class members using pointers?
22. : Which operator cannot be overloaded even as a member function?
(A) +
(C) sizeof
(D) []

23. : What is required to overload an operator?
(A) A function definition using the keyword operator
(B) A macro
(C) A struct
(D) A constant

24. : Can all arithmetic operators be overloaded?
(A) Yes
(B) No
(C) Only + and –
(D) Only / and *

25. : What type of polymorphism is operator overloading?
(A) Runtime
(B) Compile-time
(C) Dynamic
(D) None

26. : What is the return type of the overloaded [] operator?
(A) void
(B) int
(C) depends on use
(D) char

27. : When overloading the increment (++) operator, how is the postfix version distinguished?
(A) By using an int dummy parameter
(B) By using float
(C) By using double
(D) By using a pointer

28. : What is the main advantage of operator overloading?
(A) Compact syntax
(B) Shorter main function
(C) Faster compilation
(D) More variables

29. : Which operators can be overloaded as both member and non-member functions?
30. : Is it possible to overload operators in C language?
(A) Yes
(B) No
(C) Only in latest versions
(D) Only with macros