WB JECA MCA C Programming Language Previous Year Questions (PYQs) – Page 3 of 3

WB JECA MCA C Programming Language Previous Year Questions (PYQs) – Page 3 of 3

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    Previous Year Questions

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25.What is the output of the following program ?  include <iostream>  using namespace std;  int addition (int a, int b)  {   return a+b;  }  double addition (double a, double b)  {   return a+b;  }  int main ()  {   cout<< addition (35,20) << “;”;   cout<< addition (34.1,12.7);   return 0;  } 

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26.What is the output of the following program ?  #include <iostream>  using namespace std;  template <class C1, class C2>  bool is_equal (C1 var1, C2 var2)  {   return (var1 = = var2);  }  int main ()  {   if (is_equal(10,10.0))    cout<< “Equal”;   else    cout<< “Not equal”;   return 0;  } 

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26.What is the output of the following program ?

#include <iostream>
using namespace std;

int main() 
{
    int var = 0;
    while (var < 10) 
    {
        cout << var << " ";
        var++;
    }
    cout << var;
    return 0;
}


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What is the output of the following program ?
#include <iostream>
using namespace std;
struct demo
{
    int var;
};
int main()
{
    demo str;
    demo *ptr;

    str.var = 100;
    ptr = &str;
    cout << ptr->var;
    return 0;
}


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29.What is the output of the following program ?
#include <iostream>
using namespace std;
int main ()
{
    int c1 = 10;
    int c2 = 20;
    {
        int c1;
        c1 = 50;
        c2 = 50;
        cout << "c1= " << c1 << ", c2=" << c2;
    }
    cout << ", c1= " << c1 << ", c2=" << c2;
    return 0;
}


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30.What is the output of the following program ?
#include <iostream>
using namespace std;

class Demo {
public:
    static int count;
    Demo() { count++; }
};

int Demo::count = 0;

int main() {
    Demo var1;
    Demo var2[5];
    cout << var1.count;
    return 0;
}


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31.What is the output of the following program ?
#include <iostream>
using namespace std;

void print();
int main()
{
    int var = 0;
    var = print();
    cout << var;
    return 0;
}

void print()
{
    cout << "Hi";
}


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32.What is the output of the following program ?
#include <iostream>
using namespace std;

int main()
{
    int var = 2;
    do
    {
        cout << var;
    } while (var--);
    return 0;
}


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