Interview Questions

1. The class members are by default ………….

Options:

a. Public

b. Private

c. Protected

d. Inherited

Reveal Answer

2. Which of the following is false about classes

Options:

a. Permits the data to be hidden from other classes

b. It contains data member and member functions

c. It brings together all aspects of an entity in one place

d. All of the above.

Reveal Answer

3. Which of the following helps you to find out the dynamic type of an object when you have only pointer or a reference to the base type?

Options:

a. Object type

b. Abstract data type

c. Reference type

d. Runtime type Identification

Reveal Answer

4. What is the size of an object of an empty class?

Options:

a. 0

b. Undefined

c. 1

d. Garbage value

Reveal Answer

5. Which of these means exposing the essential data of an object and hiding the background details.

Options:

a. Inheritance

b. Encapsulation

c. Data abstraction

d. Polymorphism

Reveal Answer

6. Which operator is used to create a memory space of specified type and returns the starting address to the pointer variable.

Options:

a. malloc

b. New

c. Calloc

d. None of the above

Reveal Answer

7. What is the significance of endl in c++?

Options:

a. Creates a new line

b. Creates space between two words

c. Removes a line

d. None

Reveal Answer

8. Private members can be accessed

Options:

a. Within the class

b. Outside the class

c. Both within and outside the class

d. None of the above

Reveal Answer

9. The data members in the class are usually declared as private and the member functions are declared as ………………….

Options:

a. public

b. private

c. protected

d. inherited

Reveal Answer

10. The operator :: is known as:

Options:

a. Conditional operator

b. Extraction operator

c. Scope resolution operator

d. Field width operator

Reveal Answer

11. Can a member function call another member function directly?

Options:

a. Partially yes

b. No

c. Partially no

d. Yes

Reveal Answer

12. What is the name of the function which is defined inside the class

Options:

a. Inline function

b. normal function

c. data function

d. none

Reveal Answer

13. Identify the error in the following program #include <iostream> using namespace std; class room { int width,height; void setvalue(int w, int h) { width = w; height = h; } }; int main() { room r1; r1.width = 12; return 0; }

Options:

a. r1.width = 12;

b. r1.width = 15;

c. r1.width = 12,78

d. r1.room = 12;

Reveal Answer

14. Can member functions be nested?

Options:

a. Can’t predict

b. Yes

c. No

d. May be

Reveal Answer

15. What are the four default functions available for each object?

Options:

a. Copy constructor, Inline function, constructor,

b. Constructor, copy constructor, Inline function,

c. Inline function, default constructor, destructor, constructor

d. Constructor, destructor, copy constructor, default constructor

Reveal Answer

16. What is the value of the static member variable when the first object of a class is created?

Options:

a. Undefined

b. 1

c. 0

d. Garbage value

Reveal Answer

17. What is the scope of the static data members?

Options:

a. Inside the class

b. Outside the class

c. Both (a) and (b)

d. None of the above.

Reveal Answer

Interview Questions and Answer

1. The class members are by default ………….

2. Which of the following is false about classes

3. Which of the following helps you to find out the dynamic type of an object when you have only pointer or a reference to the base type?

4. What is the size of an object of an empty class?

5. Which of these means exposing the essential data of an object and hiding the background details.

6. Which operator is used to create a memory space of specified type and returns the starting address to the pointer variable.

7. What is the significance of endl in c++?

8. Private members can be accessed

9. The data members in the class are usually declared as private and the member functions are declared as ………………….

10. The operator :: is known as:

11. Can a member function call another member function directly?

12. What is the name of the function which is defined inside the class

13. Identify the error in the following program #include <iostream> using namespace std; class room { int width,height; void setvalue(int w, int h) { width = w; height = h; } }; int main() { room r1; r1.width = 12; return 0; }

14. Can member functions be nested?

15. What are the four default functions available for each object?

16. What is the value of the static member variable when the first object of a class is created?

17. What is the scope of the static data members?

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