C++ miscellaneous MCQ question and answer with solution | C++ Programimg MCQs

#include <iostream>
#include <complex>
using namespace std;
int main()
{
	complex <double> cn(3.0, 4.0);
	cout<<"Norm is: "<<norm(cn)<<endl;
	return 0;
}

#include <cstdlib>
#include <iostream>
using namespace std;
int main()
{
    cout << RAND_MAX << endl;
}

#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]);
    }
}

#include <iostream>
#include <functional>
#include <algorithm>
using namespace std;
int main ()
{
    int numbers[] = {10, -20, -30, 40, -50};
    int cx;
    cx = count_if ( numbers, numbers + 5, bind2nd(less<int>(), 0) );
    cout << cx;
    return 0;
}

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
	bitset<8> b1(95);
	bitset<8> b2(46);
	cout<<(b1^b2);
}

i) cout<<*i1;
ii) i2 can be used with == operator
iii) *i1 = 1
iv) i2--