Transition From C to C++

1. Which of the following is a key feature added in C++ but not available in C?

A) Pointers
B) Classes
C) Functions
D) Arrays

Correct Answer: (B) Classes

2. How is a function parameter passed by reference in C++?

A) By using & after the type
B) By using & before the type
C) By using *
D) By using &&

Correct Answer: (A) By using & after the type

3. What is the default value in C++ used for?

A) To store garbage values
B) To assign a constant value to the arguments
C) To assign a default value to function parameters
D) To return a value from a function

Correct Answer: (C) To assign a default value to function parameters

4. What is the syntax for calling a function by reference in C++?

A) type* identifier
B) type& identifier
C) type identifier&
D) type&* identifier

Correct Answer: (B) type& identifier

5. Which of the following is a new type introduced in C++ that extends the C struct?

A) Object
B) Class
C) Pointer
D) Variable

Correct Answer: (B) Class

6. Which keyword is used in C++ to define public members of a class?

A) private
B) protected
C) public
D) default

Correct Answer: (C) public

7. Which function is called automatically when an object of a class is created in C++?

A) Destructor
B) Operator
C) Constructor
D) Function pointer

Correct Answer: (C) Constructor

8. What is the purpose of a destructor in C++?

A) It allocates memory
B) It deallocates memory
C) It inherits the base class
D) It initializes variables

Correct Answer: (B) It deallocates memory

9. In C++, what is the symbol for the destructor function?

A) ::
B) ~
C) ->
D) &

Correct Answer: (B) ~

10. Which of the following features distinguishes C++ from C?

A) File handling
B) Classes and Objects
C) Functions
D) Arrays

Correct Answer: (B) Classes and Objects

11. What is the scope resolution operator in C++ used for?

A) To define global variables
B) To access class member functions outside the class
C) To create a destructor
D) To overload operators

Correct Answer: (B) To access class member functions outside the class.

12. Which of the following is true about function overloading in C++?

A) Functions with different names can have the same arguments
B) Functions with the same name must have different parameters
C) Functions with the same name can have the same parameters
D) Functions cannot be overloaded in C++

Correct Answer: (B) Functions with the same name must have different parameters.

13. What is the main advantage of using a constructor in C++?

A) It initializes class objects automatically
B) It allocates memory dynamically
C) It deallocates memory
D) It hides data from other functions

Correct Answer: (A) It initializes class objects automatically.

14. What is the default access specifier for class members in C++?

A) public
B) private
C) protected
D) global

Correct Answer: (B) private.

15. Which feature of C++ allows a function to behave differently based on the arguments passed?

A) Overloading
B) Constructors
C) Destructors
D) Pointers

Correct Answer: (A) Overloading.

16. Which C++ feature enables hiding the implementation details from the user?

A) Data abstraction
B) Function pointers
C) Virtual functions
D) Polymorphism

Correct Answer: (A) Data abstraction.

17. Which of the following is an example of polymorphism in C++?

A) Function overloading
B) Pointers
C) Inline functions
D) Constructors

Correct Answer: (A) Function overloading.

18. What is the purpose of the inline keyword in C++?

A) To reduce the execution time of the program
B) To define large functions
C) To improve memory management
D) To implement file handling

Correct Answer: (A) To reduce the execution time of the program.

19. Which of the following represents a correct constructor declaration for a class named "Test"?

A) void Test();
B) Test();
C) int Test();
D) ~Test();

Correct Answer: (B) Test();

20. Which of the following is true for destructors in C++?

A) They can take parameters
B) They are called manually
C) They are called automatically when an object is destroyed
D) They can be overloaded

Correct Answer: (C) They are called automatically when an object is destroyed.

21. Which of the following is a feature of Object-oriented Programming (OOP)?

A) Encapsulation
B) Inheritance
C) Polymorphism
D) All of the above

Correct Answer: (D) All of the above.

22. What is the term for combining data and functions that operate on the data in a single unit?

A) Inheritance
B) Encapsulation
C) Polymorphism
D) Overloading

Correct Answer: (B) Encapsulation.

23. Which of the following is NOT a type of inheritance in C++?

A) Single inheritance
B) Multiple inheritance
C) Hybrid inheritance
D) Pointer inheritance

Correct Answer: (D) Pointer inheritance.

24. In OOP, which of the following supports dynamic method resolution?

A) Polymorphism
B) Encapsulation
C) Inheritance
D) Abstraction

Correct Answer: (A) Polymorphism.

25. Which keyword is used to define an abstract class in C++?

A) abstract
B) virtual
C) private
D) protected

Correct Answer: (B) virtual.

26. What is the relationship between base class and derived class in inheritance?

A) IS-A relationship
B) HAS-A relationship
C) PART-OF relationship
D) USES-A relationship

Correct Answer: (A) IS-A relationship.

27. Which of the following is used to prevent a class from being inherited?

A) Final keyword
B) Constant keyword
C) Static keyword
D) Virtual keyword

Correct Answer: (A) Final keyword.

28. Which operator is used to access the members of a class in C++?

A) ->
B) . (dot operator)
C) *
D) &

Correct Answer: (B) . (dot operator).

29. Which type of function can have different implementations depending on the object that calls it?

A) Inline function
B) Virtual function
C) Friend function
D) Constructor

Correct Answer: (B) Virtual function.

30. A constructor is called when:

A) An object is created
B) An object is destroyed
C) A function is called
D) None of the above

Correct Answer: (A) An object is created.

31. Which of the following statements about destructors is true?

A) Destructors can be overloaded
B) Destructors cannot take arguments
C) Destructors are called manually
D) Destructors are inherited

Correct Answer: (B) Destructors cannot take arguments

32. In C++, what happens when a class inherits from another class with public access?

A) Only private members of the base class become private in the derived class
B) Public members of the base class remain public in the derived class
C) Protected members of the base class become private in the derived class
D) All members of the base class become private in the derived class

Correct Answer: (B) Public members of the base class remain public in the derived class

33. In multiple inheritance, if two base classes have a function with the same name, how can you resolve the ambiguity in the derived class?

A) Use scope resolution operator
B) Overload the function
C) Use polymorphism
D) Declare the function as final

Correct Answer: (A) Use scope resolution operator

34. Which concept allows functions to be defined with the same name but with different signatures in C++?

A) Encapsulation
B) Overloading
C) Abstraction
D) Inheritance

Correct Answer: (B) Overloading

35. What is the purpose of a copy constructor?

A) To initialize an object using another object of the same class
B) To allocate dynamic memory to objects
C) To free the memory of an object
D) To create a new class from a base class

Correct Answer: (A) To initialize an object using another object of the same class

36. Which of the following is a valid declaration of a pure virtual function in C++?

A) virtual void show() {}
B) virtual void show() = 0;
C) void show() {}
D) void show() = 0;

Correct Answer: (B) virtual void show() = 0;

37. Which of the following C++ concepts provides the ability to define the same function in multiple derived classes and invoke the correct one based on the object type?

A) Encapsulation
B) Inheritance
C) Polymorphism
D) Abstraction

Correct Answer: (C) Polymorphism

38. Which of the following is NOT an access specifier in C++?

A) Private
B) Protected
C) Public
D) Friend

Correct Answer: (D) Friend

39. In C++, the keyword this refers to:

A) The current object
B) The parent class
C) A static member function
D) A global object

Correct Answer: (A) The current object

40. Which of the following is used to release memory allocated to an object in C++?

A) Constructor
B) Destructor
C) Copy constructor
D) Inline function

Correct Answer: (B) Destructor

✨ BCA JUL24 Batch ✨

Join Our WhatsApp Group

Interactive MCQs Quiz