How many kinds of entities are directly parameterized in c++?

What is the output of this program?

#include
        using namespace std;
        struct sec {
            int a;
            char b;
        };
        int main()
        {
            struct sec s ={25,50};
            struct sec *ps =(struct sec *)&s;
            cout << ps->a << ps->b;
            return 0;
        }

What is the output of this program ?

       #include
        using namespace std;
        int n(char, int);
        int (*p) (char, int) = n;
        int main()
        {
            (*p)('d', 9);
            p(10, 9);
            return 0;
        }
        int n(char c, int i)
        {
            cout << c <<  i;
            return 0;
        }

What is the output of this program?

#include
        using namespace std;
        void fun(int x, int y)
        {
            x = 20;
            y = 10;
        }
        int main()
        {
            int x = 10;
            fun(x, x);
            cout << x;
            return 0;
        }

What is the output of this program?

 #include
       using namespace std;
       int main()
       {
           int arr[] = {4, 5, 6, 7};
           int *p = (arr + 1);
           cout << arr;
           return 0;
       }

What is meaning of following declaration?
int(*p[5])();

Which of the following is a properly defined structure?

Which of the following gives the memory address of the first element in array?

Which is more effective while calling the functions?

What is the default return type of a function ?

In tree construction which is the suitable efficient data structure?

What is the general syntax for accessing the namespace variable?

Which of the following type casts will convert an Integer variable named amount to a Double type ?

Which of the following is not a correct variable type?

Which operator is used in catch-all handler?

In an AVL tree the balancing is to be done when the pivotal value is in range of

which keyword is used to define the macros in c++?

What do vectors represent?

Which is also called as abstract class?

Which of the following type of data member can be shared by all instances of its class?