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Welcome to the Classes and Operator Overloading in C++ MCQs Page

Dive deep into the fascinating world of Classes and Operator Overloading in C++ with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Classes and Operator Overloading in C++, a crucial aspect of Object Oriented Programming Using C++. In this section, you will encounter a diverse range of MCQs that cover various aspects of Classes and Operator Overloading in C++, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Object Oriented Programming Using C++.

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Check out the MCQs below to embark on an enriching journey through Classes and Operator Overloading in C++. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Object Oriented Programming Using C++.

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Classes and Operator Overloading in C++ MCQs | Page 25 of 39

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Q241.
What will be the output of the program given below?
#include<iostream.h> 
class BitsBase
{
    int x;
    public:
    BitsBase(int xx = 0)
    {
        x = xx; 
    }
    void Display()
    {
        cout<< x ;
    }
};
class BitsDerived : public BitsBase
{
    int y; 
    public:
    BitsDerived(int yy = 0)
    {
        y = yy;
    }
    void Display()
    {
        cout<< y ;
    }
};
int main()
{
    BitsBase objBase(10); 
    BitsBase &objRef = objBase;

    BitsDerived objDev(20); 
    objRef = objDev;

    objDev.Display(); 
    return 0; 
}
Discuss
Answer: (c).20
Q242.
Which of the following statement is correct about the program given below?
#include<iostream.h> 
class Compscibits
{
    int x, y; 
    public:
    Compscibits(int xx = 0, int yy = 0)
    {
        x = xx; 
        y = yy;
    }
    void Display()
    {
        cout<< x << " " << y;
    }
    Compscibits operator +(Compscibits z)
    {
        Compscibits objTemp;
        objTemp.x = x + z.x;
        objTemp.y = y + z.y;
        return objTemp; 
    }
};
int main()
{
    Compscibits objBits1(90, 80); 
    Compscibits objBits2(10, 20); 
    Compscibits objSum; 
    Compscibits &objRef = objSum; 
    objRef = objBits1 + objBits2; 
    objRef.Display(); 
    return 0; 
}
Discuss
Answer: (d).The program will print the output 100 100.
Q243.
A constructor that accepts __________ parameters is called the default constructor.
Discuss
Answer: (c).no
Q244.
What happens when a class with parameterized constructors and having no default constructor is used in a program and we create an object that needs a zero-argument constructor?
Discuss
Answer: (a).Compile-time error.
Q245.
Can a class have virtual destructor?
Discuss
Answer: (a).Yes
Q246.
Destructor has the same name as the constructor and it is preceded by ______ .

a.

!

b.

?

c.

~

d.

$

Discuss
Answer: (c).~
Q247.
For automatic objects, constructors and destructors are called each time the objects
Discuss
Answer: (a).enter and leave scope
Q248.
Which constructor function is designed to copy objects of the same class type?
Discuss
Answer: (d).Copy constructor
Discuss
Answer: (c).Both A and B.
Discuss
Answer: (d).Both B and C.

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