Classes and Objects in C++
practice.

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
const int SIZE = 10;
class safe
{
    private:
    int arr[SIZE];
    public:
    safe()
    {
        register int i;
        for (i = 0; i < SIZE; i++)
        {
            arr[i] = i;
        }
    }
    int &operator[](int i)
    {
        if (i > SIZE)
        {
            cout << "Index out of bounds" <<endl;
            return arr[0];
        }
        return arr[i];
    }
};
int main()
{
    safe A;
    cout << A[5];
    cout  << A[12];
    return 0;
}

Which of the following is correct about friend functions?

Which function is used to get the length of a string object?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
class sample 
{
    public:
    int x, y;
    sample() {};
    sample(int, int);
    sample operator + (sample);
};
sample::sample (int a, int b) 
{
    x = a;
    y = b;
}
sample sample::operator+ (sample param) 
{
    sample temp;
    temp.x = x + param.x;
    temp.y = y + param.y;
    return (temp);
}
int main () 
{
    sample a (4,1);
    sample b (3,2);
    sample c;
    c = a + b;
    cout << c.x << "," << c.y;
    return 0;
}

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
class A
{
	static int a;
 
   public:
	void show()
        {
		a++;
		cout<<"a: "<<a<<endl;
	}
	void operator.()
        {
		cout<<"Objects are added\n";
	}
};
 
class B
{
     public:
};
 
int main(int argc, char const *argv[])
{
	A a1, a2;
	return 0;
}

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main() 
{
    int x = 9;
    int* p = &x;
    cout << sizeof(p);
    return 0;
}

How many types of user-defined data type are in c++?

Which is the correct statement about operator overloading?

Which other keywords are also used to declare the class other than class?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
const int limit = 4;
class safearray
{
    private:
    int arr[limit];
    public:
    int& operator [](int n)
    {
        if (n == limit - 1)
        {
            int temp;
            for (int i = 0; i < limit; i++)
            {
                if (arr[n + 1] > arr[n])
                {
                    temp = arr[n];
                    arr[n] = arr[n + 1];
                    arr[n + 1] = temp;
                }     
            }  
        }
        return arr[n];
    }
};
int main()
{
    safearray sa1;
    for(int j = 0; j < limit; j++)
        sa1[j] = j*10;
    for(int j = 0; j < limit; j++)
    {
        int temp = sa1[j];
        cout << "Element " << j << " is " << temp;
    }
    return 0;
}

Which of the following is a valid class declaration?

Which option is best to eliminate the memory problem?

Pick out the correct statement.

What do we need to use when we have multiple subscripts?

What will be the output of the following C++ code?

#include <iostream>
#include <complex>
using namespace std;
int main() 
{
   complex<double> c1(4.0, 16.0), c2;
   c2 = pow(c1, 2.0);
   cout << c2;
   return 0;          
}

What will be the output of the following C++ code?

#include <iostream> 
using namespace std; 
class S 
{ 
	int m; 
   public: 
	#define MAC(S::m)
};
 
int main(int argc, char const *argv[])
{
	cout<<"Hello World";
	return 0;
}

Which of the following operator cannot be used to overload when that function is declared as friend function?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main ()
{
    int a;
    int * ptr_b;
    int ** ptr_c;
    a = 1;
    ptr_b = &a;
    ptr_c = &ptr_b;
    cout << a << "\n";
    cout << *ptr_b << "\n";
    cout << *ptr_c << "\n";
    cout << **ptr_c << "\n";
    return 0;
}

In Linux, how do the heaps and stacks are managed?

Which of the following is not a function of complex values?