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

#include <stdio.h>
int main ()
{
    FILE * pFile;
    char c;
    pFile = fopen("sample.txt", "wt");
    for (c = 'A'; c <= 'E'; c++) 
    {    
        putc (c, pFile);
    }
    fclose (pFile);
    return 0;
}

#include<iostream>
#include <string>
using namespace std;
template <class T>
class Print
{
   public:
	int operator()(T a){
		cout<<a<<endl;
	}
};
int main()
{
	Print<string> str;
	Print<int> integer;
	int a = 100;
	string s = "Hello World";
	str(s);
	integer(a);
	return 0;
}

#include <iostream>
#include <deque>
using namespace std;
int main ()
{
    deque<int> mydeque;
    int sum (0);
    mydeque.push_back ( 10 );
    mydeque.push_back ( 20 );
    mydeque.push_back ( 30 );
    while (!mydeque.empty())
    {
        sum += mydeque.back();
        mydeque.pop_back();
    }
    cout << sum << '\n';
    return 0;
}