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

#include <iostream>
#include <memory>
#include <string>
using namespace std;
int main () 
{
    pair <string*, ptrdiff_t>
    result = get_temporary_buffer<string>(3);
    if (result.second > 0)
    {
        uninitialized_fill ( result.first, result.first + result.second, 
        "Hai" );
        for (int i=0; i<result.second; i++)
            cout << result.first[i] ;
        return_temporary_buffer(result.first);
    }
    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