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

#include <iostream>
#include <iterator>
#include <list>
using namespace std;
int main () 
{
    list<int> firstlist, secondlist;
    for (int i = 1; i <= 2; i++)
    {  
        firstlist.push_back(i); 
        secondlist.push_back(i * 10); 
    }
    list<int> :: iterator it;
    it = firstlist.begin(); 
    advance (it, 3);
    copy (secondlist.begin(), secondlist.end(), inserter(firstlist, it));
    for ( it = firstlist.begin(); it != firstlist.end(); ++it )
        cout << *it << " ";
    return 0;
}

What does the 'sizeof' operator return in C++?

A. Size of a data type in bits

B. Size of a data type in bytes

C. Size of a variable in bytes

D. Size of a variable in bits

Which of the following is not a fundamental data type in C++?

A. Char

B. Float

C. String

D. Double

What is the purpose of the 'static' keyword in C++?

A. To declare a variable with dynamic storage duration

B. To declare a constant

C. To declare a variable with external linkage

D. To declare a variable with static storage duration

What is the difference between '++i' and 'i++' in C++?

A. None of the above

B. They both have the same effect

C. '++i' increments the value of 'i' before returning it, while 'i++' increments the value of 'i' after returning it

D. '++i' increments the value of 'i' after returning it, while 'i++' increments the value of 'i' before returning it