Online C++ Programming Test - C++ Programming Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Which of the following access specifier is used as a default in a class definition?

protected

public

private

friend

[#]

Which of the following function / types of function cannot have default parameters?

Member function of class

main()

Member function of structure

Both B and C

[#]

Which of the following statement is incorrect?

The default value for an argument can be a global constant.

The default arguments are given in the function prototype.

Compiler uses the prototype information to build a call, not the function definition.

The default arguments are given in the function prototype and should be repeated in the function definition.

[#]

Which of the following function declaration is/are incorrect?

int Sum(int a, int b = 2, int c = 3);

int Sum(int a = 5, int b);

int Sum(int a = 0, int b, int c = 3);

Both B and C are incorrect.

All are correct.

[#]

What will be the output of the following program?

#include<iostream.h> 
typedef void(*FunPtr)(int);
int Look(int = 10, int = 20);
void Note(int); 
int main()
{
    FunPtr ptr = Note;
    (*ptr)(30); 
    return 0;
}
int Look(int x, int y)
{
    return(x + y % 20);
}
void Note(int x)
{
    cout<< Look(x) << endl;
}

Compilation fails.

[#]

Which of the following statement is correct about the program given below?

#include<iostream.h> 
static int Result;
class India
{
    public:
    void Change(int x = 10, int y = 20, int z = 30)
    {
        cout<< x + y + z;
    }
    void Display(int x = 40, float y = 50.00)
    {
        Result = x % x; 
        cout<< Result;
    }
};
class Bix
{
    int x, y; 
    public:
    void Change(int x, int y = 50)
    {
        cout<< x + y;
    }
};
class IndiaBix: public India, public Bix
{
    public:
    void Display(int x = 10, int xx = 100, int xxx = 1000)
    {
        Result = x + xx % x * x;
        cout<< Result ; 
    }
};
int main()
{
    IndiaBix objBix;
    objBix.India::Display(10, 20.00);
    return 0; 
}

The program will print the output 0.

The program will print the output 10.

The program will print the output 30.

The program will print the output 40.

The program will report compile time error.

[#]

What will be the output of the following program?

#include<iostream.h> 
void MyFunction(int a, int b = 40)
{
    cout<< " a = "<< a << " b = " << b << endl;
}
int main()
{
    MyFunction(20, 30);
    return 0; 
}

a = 20 b = 40

a = 20 b = 30

a = 20 b = Garbage

a = Garbage b = 40

[#]

What will be the output of the following program?

#include<iostream.h> 
class BaseCounter
{
    protected:
    long int count;

    public:
    void CountIt(int x, int y = 10, int z = 20)
    {
        count = 0;
        cout<< x << " " << y << " " << z << endl;
    } 
    BaseCounter()
    {
        count = 0;
    }
    BaseCounter(int x)
    {
        count = x ;
    } 
}; 
class DerivedCounter: public BaseCounter
{
    public:
    DerivedCounter()
    { }
    DerivedCounter(int x): BaseCounter(x) 
    { }
};
int main()
{
    DerivedCounter objDC(30); 
    objDC.CountIt(40, 50); 
    return 0; 
}

30 10 20

Garbage 10 20

40 50 20

20 40 50

40 Garbage Garbage

[#]

Which of the following statement is correct about the program given below?

#include<iostream.h> 
struct MyStructure
{
    class MyClass
    {
        public:
        void Display(int x, float y = 97.50, char ch = 'a')
        {
            cout<< x << " " << y << " " << ch;
        }
    }Cls; 
}Struc;
 
int main()
{
    Struc.Cls.Display(12, 'b');
    return 0; 
}

The program will print the output 12 97.50 b.

The program will print the output 12 97.50 a.

The program will print the output 12 98 a.

The program will print the output 12 Garbage b.

The program will print the output 12 Garbage a.

[#]

10.

Which of the following statement is correct about the references?

A reference must always be initialized within functions.

A reference must always be initialized outside all functions.

A reference must always be initialized.

Both A and C.

[#]

11.

Which of the following statements is correct?

A reference is not a constant pointer.
A referenced is automatically de-referenced.

Only 1 is correct.

Only 2 is correct.

Both 1 and 2 are correct.

Both 1 and 2 are incorrect.

[#]

12.

Which of the following statement is correct about the program given below?

#include<iostream.h> 
int main()
{
    int m = 2, n = 6;
    int &x = m;
    int &y = n;
    m = x++; 
    x = m++;
    n = y++;
    y = n++;
    cout<< m << " " << n; 
    return 0; 
}

The program will print output 2 6.

The program will print output 3 7.

The program will print output 4 8.

The program will print output 5 9.

The program will print output 6 10.

[#]

13.

Which of the following statement is correct about the program given below?

#include<iostream.h> 
int BixFunction(int m)
{
    m *= m;
    return((10)*(m /= m)); 
}
int main()
{
    int c = 9, *d = &c, e;
    int &z = e;
    e = BixFunction(c-- % 3 ? ++*d :(*d *= *d));
    z = z + e / 10;
    cout<< c << " " << e;
    return 0;
}

It will result in a compile time error.

The program will print the output 64 9.

The program will print the output 64 10.

The program will print the output 64 11.

[#]

14.

Which of the following statements is incorrect?

Friend keyword can be used in the class to allow access to another class.

Friend keyword can be used for a function in the public section of a class.

Friend keyword can be used for a function in the private section of a class.

Friend keyword can be used on main().

[#]

15.

Which of the following statement is correct?

Constructor has the same name as that of the class.

Destructor has the same name as that of the class with a tilde symbol at the beginning.

Both A and B.

Destructor has the same name as the first member function of the class.

[#]

16.

To ensure that every object in the array receives a destructor call, always delete memory allocated as an array with operator __________ .

destructor

delete

delete[]

kill[]

free[]

[#]

17.

A function with the same name as the class, but preceded with a tilde character (~) is called __________ of that class.

constructor

destructor

function

object

[#]

18.

Which of the following statement is correct?

A constructor has the same name as the class in which it is present.

A constructor has a different name than the class in which it is present.

A constructor always returns an integer.

A constructor cannot be overloaded.

[#]

19.

If the programmer does not explicitly provide a destructor, then which of the following creates an empty destructor?

Preprocessor

Compiler

Linker

main() function

[#]

20.

What will be the out of the following program?

#include<iostream.h> 
class BixBase
{
    public:
    int x, y; 
    public:
    BixBase(int xx = 0, int yy = 0)
    {
        x = xx;
        y = yy; 
    } 
 };
class BixDerived : public BixBase
{
    private:
        BixBase objBase; 
    public:
    BixDerived(int xx, int yy) : BixBase(xx), objBase(yy)
    {
        cout << this->x   << " " 
             << this->y   << " "  
             << objBase.x << " "
             << objBase.y << " ";
    } 
    ~BixDerived()
    { }
};
int main()
{
    BixDerived objDev(11, 22); 
    return 0;
}

11 22 0 0

11 0 0 22

11 0 22 0

11 22 11 22

The program will report compile time error.

[#]

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