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

#include <iostream>
using namespace std;
template<class T = float, int i = 5> class A
{
    public:
    A();
    int value;
};
template<> class A<> 
{ 
    public: A(); 
};
template<> class A<double, 10>
{ 
    public: A(); 
};
template<class T, int i> A<T, i>::A() : value(i)
{
    cout << value;
}
A<>::A() 
{
    cout << "default";
}
A<double, 10>::A() 
{
    cout << "10" << endl;
}
int main() 
{
    A<int, 6> x;
    A<> y;
    A<double, 10> z;
}

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