Question 1

Every object of a class maintains a (hidden) pointer to itself, and the name of this pointer is ____.
A) self
B) object
C) it
D) this

Accepted Answer

The pointer to the object of a class is called 'this' in C++ and is used to refer to the current object.

Question 2

The function that overloads the ____ operator for a class must be declared as a member of the class.
A) ::
B) *
C) ->
D) +

Accepted Answer

C

Question 3

Which of the following function prototypes overloads the != operator for the class rectangleType?
A) bool operator!=(rectangle&) const;
B) bool operator!=(const rectangleType&) const;
C) int operator!=(const rectangleType) const;
D) int operator!=(rectangle&) const;

Accepted Answer

The correct prototype for overloading the != operator in the rectangleType class is:
bool operator!=(const rectangleType&) const;
Option B is the only prototype that meets these requirements. Option A has a missing const in the parameter and option D has a missing const in the function itself. Option C returns an int instead of a bool.

Question 4

The declaration of a friend function cannot be placed within the private part of the class.

Accepted Answer

The declaration of a friend function can be placed within the private part of a class. It is common to declare a friend function within the private section so that the function can access the private members of the class.

Question 5

The return type of the function operator == is ____.
A) int
B) bool
C) char
D) void

Accepted Answer

The operator == is used to compare two values and returns a boolean value of true or false. Therefore, its return type is bool.

Question 6

A friend function does not have access to the private data members of the class.

Accepted Answer

A friend function can access the private data members of the class.

Question 7

The general form of the functions to overload the binary operators as member functions of a class is returnType operator#(____ className&) const;.
A) class
B) const
C) *
D) &

Accepted Answer

The correct form for overloading binary operators as member functions includes using the `const` keyword to indicate that the function does not modify the object on which it is called. This is important for const correctness and to allow the operator to be used with const objects.

Question 8

Both parameters of the function to overload the operator << are reference parameters.

Accepted Answer

Both parameters of the operator << overload function should be references, where the first parameter is an ostream object and the second parameter is the object to be printed. This is because references are used to avoid unnecessary object copying, which can lead to performance issues.

Question 9

The associativity of the operator = is from right to left.

Accepted Answer

The operator = is right-associative, which means that expressions are evaluated from right to left.

Question 10

The general syntax to overload the stream extraction operator >> for a class is ____.
A) istream& operator>>(istream&, className&);
B) const istream& operator>>(istream&, className&);
C) friend operator>>(istream&, className&);
D) friend istream& operator>>(istream&, className&);

Accepted Answer

To overload the stream extraction operator >> for a class, we need to declare a friend function as it needs access to private members of the class. The function should return an istream reference to allow chain input operations. So the correct syntax is "friend istream& operator>>(istream&, className&);".

Question 11

The name of the function to overload the operator <= is ____.
A) overload<=
B) <=new
C) operator<=
D) <=operator

Accepted Answer

The correct syntax to overload any operator is "operator symbol", so the correct name of the function to overload the <= operator is "operator<=".

Question 12

In C++, operator is a reserved word.

Accepted Answer

In C++, "operator" is a reserved word used to overload operators.

Question 13

Operator functions typically return void.

Accepted Answer

Operator functions can return any valid data type, not just void.

Question 14

When an object invokes a member function, the member function references the pointer ____ of the object.
A) object
B) it
C) this
D) address

Accepted Answer

When a member function is called by an object, it implicitly receives a pointer to the object as its first argument. This pointer is referred to as 'this' pointer. Therefore, the correct choice is C, which is 'this'.

Question 15

To include the operator function operator+ as a nonmember function of the class rectangleType, its prototype in the definition of rectangleType is: ____ rectangleType operator+(const rectangleType&, const rectangleType&);
A) bool
B) int
C) double
D) friend

Accepted Answer

Since operator+ is a binary operator and we want to overload it for two rectangleType objects, it is best to declare it as a friend function of the rectangleType class. This allows the function to access the private and protected members of the class, which are required for implementing the addition operation for two rectangles.

Question 16

When writing the definition of a friend function, the name of the class and the scope resolution operator precede the name of the friend function in the function heading.

Accepted Answer

Friend functions are not member functions of a class and therefore do not have the class name or scope resolution operator preceding their names in the function definition.

Question 17

Operators can be overloaded either for objects of the user-defined types, or for a combination of objects of the user-defined type and objects of the built-in type.

Accepted Answer

Operators can be overloaded for both user-defined types and combinations of user-defined and built-in types.

Question 18

A(n) ____ function is a nonmember function that has access to all members of the class.
A) access
B) protected
C) friend
D) void

Accepted Answer

A friend function is a nonmember function that is given access to all members (private and protected) of a class.

Question 19

In C++, >> is used as a stream extraction operator and as a right shift operator.

Accepted Answer

In C++, >> is used as a stream extraction operator when used with input streams like cin, and as a right shift operator when used with integer types.

Question 20

Most operator functions can either be member functions or nonmember functions of a class.

Accepted Answer

Most operator functions can be implemented as member functions or as nonmember functions of a class. The choice depends on the design of the class and the operator functionality needed.

Quiz 13: Overloading and Templates

Every object of a class maintains a (hidden) pointer to itself, and the name of this pointer is ____.

The function that overloads the ____ operator for a class must be declared as a member of the class.

Which of the following function prototypes overloads the != operator for the class rectangleType?

The declaration of a friend function cannot be placed within the private part of the class.

The return type of the function operator == is ____.

A friend function does not have access to the private data members of the class.

The general form of the functions to overload the binary operators as member functions of a class is returnType operator#(____ className&) const;.

Both parameters of the function to overload the operator << are reference parameters.

The associativity of the operator = is from right to left.

The general syntax to overload the stream extraction operator >> for a class is ____.

The name of the function to overload the operator <= is ____.

In C++, operator is a reserved word.

Operator functions typically return void.

When an object invokes a member function, the member function references the pointer ____ of the object.

To include the operator function operator+ as a nonmember function of the class rectangleType, its prototype in the definition of rectangleType is: ____ rectangleType operator+(const rectangleType&, const rectangleType&) ;

When writing the definition of a friend function, the name of the class and the scope resolution operator precede the name of the friend function in the function heading.

Operators can be overloaded either for objects of the user-defined types, or for a combination of objects of the user-defined type and objects of the built-in type.

A(n) ____ function is a nonmember function that has access to all members of the class.

In C++, >> is used as a stream extraction operator and as a right shift operator.

Most operator functions can either be member functions or nonmember functions of a class.