Void C++ MCQ

1. Which of the following will not return a value?
a) null
b) void
c) empty
d) free

Answer:b

2. ____ have the return type void?
a) all functions
b) constructors
c) destructors
d) none of the mentioned

Answer:b

3. What does the following statement mean?
    void a;
a) variable a is of type void
b) a is an object of type void
c) declares a variable with value a
d) flags an error

Answer:d

4. Choose the incorrect option
a) void is used when the function does not return a value.
b) void is also used when the value of a pointer is null.
c) void is used as the base type for pointers to objects of unknown type.
d) void is a special fundamental type.

Answer:b

5. What is the output of this program?

1.     #include <iostream>

2.     using namespace std;

3.     int main()

4.     {

5.         void a = 10, b = 10;

6.         int c;

7.         c = a + b;

8.         cout << c;

9.         return 0;

10.     }

a) 20
b) compile time error
c) runtime error
d) none of the mentioned

Answer:b