a) isalpha()
b) isalnum()
c) isdigit()
d) isblank()
Answer: b
Explanation: Character classification provides isalnum() function to check whether a character in C++ is alphabet or number.
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Which of the following permits function overloading on c++?
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
void Sum(int a, int b, int & c)
{
a = b + c;
b = a + c;
c = a + b;
}
int main()
{
int x = 2, y =3;
Sum(x, y, y);
cout << x << ” ” << y;
return 0;
}What will happen when we use void in argument passing?
What will be the output of the following C++ code?
#include <iostream>
using namespace std;
int add(int a, int b);
int main()
{
int i = 5, j = 6;
cout << add(i, j) << endl;
return 0;
}
int add(int a, int b )
{
int sum = a + b;
a = 7;
return a + b;
}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>
using namespace std;
long factorial (long a)
{
if (a > 1)
return (a * factorial (a + 1));
else
return (1);
}
int main ()
{
long num = 3;
cout << num << “! = ” << factorial ( num );
return 0;
}What will be the new value of x in the following C++ code?
#include <iostream>
using namespace std;
void fun(int &x)
{
x = 20;
}
int main()
{
int x = 10;
fun(x);
cout << “New value of x is ” << x;
return 0;
}
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