Test: Templates - 1 - Back-End Programming MCQ

Output of following program?
#include <iostream>
using namespace std;
 
template <class T>
class Test
{
private:
    T val;
public:
    static int count;
    Test()  {   count++;   }
};
 
template<class T>
int Test<T>::count = 0;
 
int main()
{
    Test<int> a;
    Test<int> b;
    Test<double> c;
    cout << Test<int>::count   << endl;
    cout << Test<double>::count << endl;
    return 0;
}

How many types of templates are there in c++?

Output of following program? Assume that the size of int is 4 bytes and size of double is 8 bytes, and there is no alignment done by the compiler.
#include<iostream>
#include<stdlib.h>
using namespace std;

template<class T, class U, class V=double>
class A  {
    T x;
    U y;
    V z;
    static int count;
};
 
int main()
{
   A<int, int> a;
   A<double, double> b;
   cout << sizeof(a) << endl;
   cout << sizeof(b) << endl;
   return 0;
}

What may be the name of the parameter that the template should take?

What is the output of the program?
#include <iostream>
using namespace std;
 
template <int i>
void fun()
{
   i = 20;
   cout << i;
}
 
int main()
{
   fun<10>();
   return 0;
}

What is a function template?

Output?
#include <iostream>
using namespace std;
  
template<int n> struct funStruct
{
    static const int val = 2*funStruct<n-1>::val;
};
  
template<> struct funStruct<0>
{
    static const int val = 1 ;
};
  
int main()
{
    cout << funStruct<10>::val << endl;
    return 0;
}