Operator Overloading MCQ in C++

Operator Overloading MCQ C++ with answers and explanations for placement tests and job interviews. These solved C++ Operator Overloading MCQ questions are useful for the campus placement of all freshers including Engineering Students, MCA students, Computer and IT Engineers, etc.

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Guideline of MCQ on Operator Overloading in C++:

This MCQ on Operator Overloading in C++ is intended for checking your knowledge of C++ Operator Overloading. It takes 30 minutes to pass the C++ quiz on Operator Overloading. If you don’t finish the C++ Operator Overloading quiz within the mentioned time, all the unanswered questions will count as wrong. Every unanswered question will count as wrong. MCQ on Operator Overloading in C++ has randomization features that give you a new question set at every attempt.

In this MCQ on Operator Overloading in C++, we have also implemented a feature that does not allow the user to see the next question or finish the quiz without attempting the current C++ Operator Overloading quiz.

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You have 30 minutes to take the C++ Operators Overloading MCQs

C++ Operator Overloading MCQ

C++ Operator Overloading MCQ: Multiple Choice Questions and Answers on Operator Overloading

1 / 23

Which of the following operators cannot be overloaded.

.* (Pointer-to-member selection)

. (Member Access or Dot operator)

?: (Ternary or Conditional Operator )

:: (Scope Resolution Operator)

All of the above

2 / 23

What is the output of the below code?

#include <iostream>
using namespace std;

class Multiplier
{
public:
Multiplier(int m): m_multiplier(m) {}
int operator()(int x)
{
return m_multiplier * x;
}
int operator()(int x, int y)
{
return m_multiplier * x *y;
}
private:
int m_multiplier;
};

int main()
{
//creating object
Multiplier m(2);
int data = m(4);
cout << "data = "<< data << endl;
data = m(2,5);
cout << "data = "<< data << endl;
return 0;
}

8, 20

20, 8

compiler error

None of the above

3 / 23

Which of the following is not a casting operator in CPP?

explicit_cast

static_cast

dynamic_cast

reinterpret_cast

4 / 23

Which is the correct example of a binary operator?

5 / 23

Using the friend operator function, following a perfect set of operators may not be overloaded.

= , ( ) , [ ] , ->

?, = , ( ) , ++

None of the above

6 / 23

Which of the following operators are overloaded by default by the compiler in every user-defined class even if the user has not written?

1) Comparison Operator ( == )
2) Assignment Operator ( = )

Only 1

Only 2

Both 1 and 2

None of the above

7 / 23

What is a binary operator?

Operator that performs its action on two operand

Operator that performs its action on a single operand

Operator that performs its action on three operand

Operator that performs its action on any number of operands

8 / 23

Which of the following operators should be preferred to overload as a global function rather than a member method?

Postfix ++

Comparison Operator

Insertion Operator <<

Prefix++

9 / 23

An operator function is created using _____________ keyword.

allocator

iterator

operator

constructor

10 / 23

Which of the following is the perfect set of operators that can’t be overloaded in C++?

+=, ?, :: , >>

>>, <<, ?, *, sizeof()

:: , . , .* , ?:

:: , ->, * , new, delete

11 / 23

Which of the following operator functions cannot be global, i.e., must be a member function.

new

delete

Converstion Operator

All of the above

12 / 23

What is the output of the below code?

#include <iostream>
using namespace std;

class Test2
{
int y;
};

class Test
{
int x;
Test2 t2;
public:
operator Test2 ()
{
return t2;
}
operator int ()
{
return x;
}
};

void fun ( int x)
{
cout << "fun(int) called";
}
void fun ( Test2 t )
{
cout << "fun(Test 2) called";
}

int main()
{
Test t;
fun(t);
return 0;
}

fun(int) called

fun(Test 2) called

Compiler Error: Ambiguous call to fun()

All of the above

13 / 23

Which statement true for Assignment operator overloading C++?

An assignment operator must be implemented as a non-static member function with exactly one parameter.

A base class assignment operator is always hidden by the copy assignment operator of the derived class (Not inherited by derived classes).

Both statements

None of the above

14 / 23

When overloading unary operators using Friend function,it requires_____ argument/s.

None of the above

15 / 23

What is the output of the below code?

#include<iostream>
using namespace std;
class A
{
int i;
public:
A(int ii = 0) : i(ii) {}
void show()
{
cout << i << endl;
}
};

class B
{
int x;
public:
B(int xx) : x(xx) {}
operator A() const
{
return A(x);
}
};

void g(A a)
{
a.show();
}

int main()
{
B b(10);
g(b);
g(20);
return 0;
}

10, 20

Compiler Error

20, 20

10, 10

16 / 23

Scope resolution operator is used______ .

to resolve the scope of global variables only

to resolve the scope of functions of the classes only

to resolve scope of global variables as well as functions of the classes

None of the above

17 / 23

While overloading binary operators using member function, it requires ___ argument?

18 / 23

How can we restrict the dynamic allocation of objects of a class using new?

By overloading new operator

By making an empty private new operator

By making an empty private new and new[] operators

By overloading new operator and new[] operators

19 / 23

Which is the correct statement about operator overloading in C++?.

Operator overloading cannot change the precedence and associativity of operators.

You cannot redefine the meaning of operators when applied to built-in data types.

Unary operators declared as member functions take no arguments; if declared as global functions, they take one argument.

All of the above.

20 / 23

In the case of binary operator overloading with member function, which of the following statements should be taken into consideration?

Left hand operand must be object.

Right hand operand must be object.

Both the operands must be objects.

None of the above

21 / 23

Which of the following operator(s) cannot be overloaded?

. (Member Access or Dot operator)

?: (Ternary or Conditional Operator )

:: (Scope Resolution Operator)

All of the above

22 / 23

In case of operator overloading, the operator function must be ______.

1. Static member functions
2. Non- static member functions
3. Friend Functions

2 , 3

1 , 3

23 / 23

How does the C++ compiler differ between overloaded postfix and prefix operators?

C++ doesn't allow both operators to be overlaoded in a class

A postfix ++ has a dummy parameter

A prefix ++ has a dummy parameter

By making prefix ++ as a global function and postfix as a member function.

Your score is

Operator Overloading MCQ in C++

Guideline of MCQ on Operator Overloading in C++:

You have 30 minutes to take the C++ Operators Overloading MCQs

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