Why is this not a reference?

Can you reseat a reference to make it refer to a different object in C++?

How many objects reference can refer to during its lifetime?

Pick the correct statement about references.

Which of the following functions must use reference.

Predict the output of following C++ program.

#include<iostream>
using namespace std;
 
int &fun()
{
    static int x = 10;
    return x;
}
int main()
{
    fun() = 30;
    cout << fun();
    return 0;
}

Output of following C++ program?

#include<iostream>
using namespace std;
 
int main()
{
  int x = 10;
  int& ref = x;
  ref = 20;
  cout << "x = " << x << endl ;
  x = 30;
  cout << "ref = " << ref << endl;
  return 0;
}

1. 

x = 20
ref = 30

2. 

x = 20
ref = 20

3.

x = 10
ref = 30

4. 

x = 30
ref = 30

Pick the correct statement about references in C++.

#include<iostream>
using namespace std;
 
int &fun()
{
    int x = 10;
    return x;
}
int main()
{
    fun() = 30;
    cout << fun();
    return 0;
}

What is the output?

#include <iostream>
#include <string>
#include <cstdlib>

using namespace std;

int main()
{
    int a = 5;
    int *p = &a;
    int &q = p;
    cout<<p;
    return 0;
}

Which of the following is FALSE about references in C++

If a function receives a reference to a variable, can it modify the value of the variable?

What is the return value of f(p, p) if the value of p is initialized to 5 before the call? Note that the first parameter is passed by reference, whereas the second parameter is passed by value.

int f(int &x, int c) {
   c  = c - 1;
   if (c == 0) return 1;
   x = x + 1;
   return f(x, c) * x;
} 

Which of the following statement is correct about the references?

A reference is declared using the _____ symbol.