OOPS Concepts problems
- 1. Which of the following concepts means wrapping up of data and functions together?
Options- A. Abstraction
- B. Encapsulation
- C. Inheritance
- D. Polymorphism Discuss
Correct Answer: Encapsulation
- 2. Which of the following is not a type of constructor?
Options- A. Copy constructor
- B. Friend constructor
- C. Default constructor
- D. Parameterized constructor Discuss
Correct Answer: Friend constructor
- 3. Which of the following access specifier is used as a default in a class definition?
Options- A. protected
- B. public
- C. private
- D. friend Discuss
Correct Answer: private
- 4. Which of the following statement is correct?
Options- A. A constructor is called at the time of declaration of an object.
- B. A constructor is called at the time of use of an object.
- C. A constructor is called at the time of declaration of a class.
- D. A constructor is called at the time of use of a class. Discuss
Correct Answer: A constructor is called at the time of declaration of an object.
- 5. cout is a/an __________ .
Options- A. operator
- B. function
- C. object
- D. macro Discuss
Correct Answer: object
- 6. Which of the following header file includes definition of cin and cout?
Options- A. istream.h
- B. ostream.h
- C. iomanip.h
- D. iostream.h Discuss
Correct Answer: iostream.h
- 7. Which of the following concepts is used to implement late binding?
Options- A. Virtual function
- B. Operator function
- C. Const function
- D. Static function Discuss
Correct Answer: Virtual function
- 8. What happens if the base and derived class contains definition of a function with same prototype?
Options- A. Compiler reports an error on compilation.
- B. Only base class function will get called irrespective of object.
- C. Only derived class function will get called irrespective of object.
- D. Base class object will call base class function and derived class object will call derived class function. Discuss
Correct Answer: Base class object will call base class function and derived class object will call derived class function.
- 9. Which of the following statements regarding inline functions is correct?
Options- A. It speeds up execution.
- B. It slows down execution.
- C. It increases the code size.
- D. Both A and C. Discuss
Correct Answer: Both A and C.
- 10. Which one of the following options is correct about the statement given below? The compiler checks the type of reference in the object and not the type of object.
Options- A. Inheritance
- B. Polymorphism
- C. Abstraction
- D. Encapsulation Discuss
Correct Answer: Polymorphism
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