Question: 11 -

What happens to a function defined inside a class without any complex operations (like looping, a large number of lines, etc)?

It becomes a virtual function of the class

It becomes an inline function of the class

It becomes a default calling function of the class

The program gives an error

Answer:

It becomes an inline function of the class

Solution:

Any function which is defined inside a class and has no complex operations like loops, a large number of lines then it is made inline.

Question: 12 -

How many minimum number of functions should be present in a C++ program for its execution?

1

0

3

2

Answer:

1

Solution:

The execution of a C++ program starts from main function hence we require atleast 1 function to be present in a C++ program to execute and i.e. the main function.

Question: 13 -

What is the scope of the variable declared in the user defined function?

the main function

whole program

only inside the {} block

header section

Answer:

only inside the {} block

Solution:

The variable is valid only in the function block as in other.

Question: 14 -

Which of the following is the default return value of functions in C++?

int

void

char

float

Answer:

int

Solution:

C++ uses int as the default return values for functions. It also restricts that the return type of the main function must be int.

Question: 15 -

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

#include <iostream>
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;
}

Error

20

30

10

Answer:

10

Solution:

In this program, we called by value so the value will not be changed, So the output is 10