What is the output of the following C program?

#include<stdio.h>

int i;

void fun()

{

        i++;

}

int main()

{

        i=5;

        fun();

        printf("%d",i);

}

What is the concept of two functions with the same name called?

If you do not place a parenthesis after the keyword 'main', what error will be generated?

What is the purpose of an adapter in the C++ Standard Template Library (STL)?

What will be the output of the following C code?

#include<stdio.h>

int main()

{

 int x = 0;

 int *ptr = &x;

 printf("%d\n", *ptr);

return 0;

}

Which of the following is/are true about virtual functions?

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

#include <iostream>

using namespace std;

void square (int *x)

{

*x = (*x + 1) * (*x);

}

int main ( )

{

int num = 10;

       square(&num);

cout << num; 

return 0;

}

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

#include <iostream>
#include <cctype>
using namespace std;
int main(int argc, char const *argv[])
{
char arr[12] = "H3ll0\tW0r1d";
for(int i=0;i<12;i++)
       {
cout<<(bool)iscntrl(arr[i]);
}
}

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

#include <stdio.h>

#include<iostream>

using namespace std;

int array1[] = {1200, 200, 2300, 1230, 1543};

int array2[] = {12, 14, 16, 18, 20};

int temp, result = 0;

int main()

{

for (temp = 0; temp < 5; temp++) 

{

           result += array1[temp];

}

for (temp = 0; temp < 4; temp++)

{

           result += array2[temp];

}

cout << result;

return 0;

}