Friday, 13 March 2020

CS304-Object Oriented Programming Quiz MCQs Lecture 1-22 Midterm Objective Questions | SUPERSTARWEBTECH


CS304-OOP Quiz  MCQS #Objective #Questions #Midterm

1. In which of the following, different forms of a single entity exist?
  • Composition y
  • Aggregation
  • Polymorphism
  • Encapsulation
2. Encapsulation means
  • Extending the behavior of a class in another class
  • Data and behavior are tightly coupled within an object y
  • One entity takes all the attributes and operations of the other
  • Taking out the common features and put those in a separate class
3. The technique in which we visualize our programming problems according to real life's problems is called ___
  • Structure Programming
  • Object Oriented Programming
  • Procedural Programming
  • Sequential Programming
4. There is no need of "is a" or "is a kind of" relationship in Generalization.
  • True
  • False
5. If only one behavior of a derived class is incompatible with base class, then it is
  • Generalization
  • Specialization
  • Extension
  • Encapsulation
6. The process of hiding unwanted details from users is called __
  • Protection
  • Encapsulation y
  • Argumentation
  • Abstraction
7. ___ is automatically called when the object is created.
  • member function
  • object
  • constructor
  • None
8. ___ provide the facility to access the data member.
  • accesser function
  • private function
  • inline function
  •  None
9. The concept of derived classes is involved in
  • inheritance
  • encapsulation
  • structure
  • array
10. Which part of an object exhibits its state?
  • Data y
  • Operations
  • Any public part
  • Any private part
11. Inheritance is a way to
  • organize data
  • pass arguments to objects of classes
  • add features to existing classes without rewriting them y
  • improve data-hiding and encapsulation
12. What problem(s) may occur when we copy objects without using deep copy constructor?
  • Dangling pointer
  • Memory leakage
  • All of given y
  • System crash
13. This pointers are not accessible for static member functions.
  • True y
  • False
14. A static member function cannot be declared
  • Static
  • Implicit
  • Explicit
  • Virtual y 
15. ___ remain in memory even when all objects of a class have been destroyed
  • Static variables y
  • Instance variables
  • Primitive variables
  • None
16. Friend functions are functions of a class
  • Object member
  • non-member y
  • data member
  • None
17. ___, which means if A declares B as its friend it does NOT mean that A can access private data of B. It only means that B can access all data of A.
  • Friendship is one way only y
  • Friendship is two way only
  • No friendship between classes
  • Any kind of friendship
18. The statement objA=objB; will cause a compiler error if the objects are of different classes.
  • True y
  • False
19. Identify which of the following overloaded operator function's declaration is appropriate for the given call?
Rational_number_1+2.325
Where Rational_number_1 is an object of user defined class Rational_number.
  • Rational_number operator+(Rational_number&obj);
  • Rational_number operator+(double&obj); y
  • Rational_number operator+(Rational_number&obj, double&num);
  • operator+(double&obj);
20. Which operator can not be overloaded?
  • The relation operator (>=)
  • Assignment operator (=)
  • Script operator([])
  • Conditional operator(?:) y
21. Memory is allocated to non static members only, when:

  • Class is created
  • Object is defined
  • Object is initialized
  • Object is created y

22. Consider the following code segment:
class test
{
int a;
int b;
int c;
public:
test();b(5).c(a).a(b){}}

  • 5, 5, 5
  • 5, Junk value, 5
  • Junk value, 5, Junk value
  • Junk value, 5, 5 y

23. If you do not initialize static variable of int type then it is automatically initialized with ___

  • 0 y
  • 1
  • Null
  • None

24. In Object Oriented programming, objects communicate with each other through ___

  • Messages 
  • Data members y
  • Voice chat
  • Ports

25. If we are create array of objects through new operator, then

  • We can call overloaded constructor through new
  • We can't call overloaded constructor through new
  • We can call default constructor through new
  • None y

26. When a base class can be replaced by the derived class then it is called

  • sub-typing y
  • super-typing
  • Generalization
  • Specialization

27. ___ and ___ methods can not be declared virtual.

  • Private, Static
  • Private, Public
  • Static, Public y
  • None

28. Separation of implementation from interface provides the facility to restrict the ___ from direct access.

  • Data Member
  • Data Function
  • Class
  • None y

29. We can access a private static variable through:

  • Static data member y
  • Static member function
  • Global data member
  • None

30. Consider the call given below of an overloaded operator "+"
Rational_number_1 + Rational_number_2
Where Rational_number_1 and Rational_number_2 are two objects of Rational_number class (a user defined class). Identify which of the above two objects will be passed as an argument to the overloaded operator function?

  • Rational_number_1
  • None
  • Both Rational_number_1 & Rational_number_2
  • any of the two objects, randomly y

31. Static member can not be called with the class name.

  • True
  • False y

32. In a class declaration, data or functions designated private are accessible

  • to any function in the program
  • only if you know the password
  • to member functions of that class y
  • only to public members of the class

33. The ___ keyword tells the compiler to substitute the code within the function definition for every instance of a function call

  • virtual
  • inline y
  • instance
  • None

34. The >= operator can't be overloaded.

  • True y
  • False

35. Main advantage of inheritance is:

  • Better understanding y
  • Less understanding
  • Reuse
  • Less complexity

36. An instance of user defined type is called ___

  • Object y
  • Class
  • Variable
  • Program

37. If a class involves dynamic memory allocation, then:

  • Default copy constructor, shallow copy is implemented
  • User defined copy constructor, shallow copy is implemented y
  • Default copy constructor, deep copy is implemented
  • User defined copy constructor, deep copy is implemented

38. Information hiding can be achieved through ___

  • Encapsulation, Inheritance
  • Encapsulation, Polymorphism y
  • Encapsulation, Abstraction
  • Encapsulation, Overloading

39. In programming, where the actual actions are coded is called:

  • Function declaration y
  • Function calling
  • Function definition
  • None

40. Which of the following will happen when a constant function tries to change the value of data members of the class?

  • Compiler will allow changing data members
  • Program will be executed successfully
  • Compile time error will occur y
  • Run time error will occur

41. Which of the following features of OOP is used to derive a class from another?

  • Encapsulation
  • Polymorphism
  • Data hiding
  • Inheritance y

42. Suppose there is an object of type Person, which of the following can be considered as one of its attributes?

  • Name y
  • Eat
  • Work
  • Sleep

43. The ability to derive a class from more than one classes is called.

  • Single inheritance
  • Encapsulation
  • Multiple inheritance y
  • Polymorphism

44. Without using Deep copy constructor. A ___ problem can occur.

  • System crash
  • Memory Leakage
  • Dangling pointer
  • All of given y

45. Aggregation is implemented using pointer.

  • True y
  • False

46. Which of the following is directly related to polymorphism?

  • Overriding y
  • Constant members
  • Static members
  • None

47. Which of the following is the way to extract common behavior and attributes from the given classes and make a separate class of those common behaviors and attributes?

  • Generalization
  • Sub-typing y
  • Specialization
  • Extension

48. We can allocate dynamic memory allocation through ___ key word.

  • Static
  • Global
  • New y
  • Constant

49. Which of the following is an advantage of OOP?

  • OOP makes it easy to re-use the code
  • It provides an ability to create one user defined data type by extending the other
  • It provides the facility of defining Abstract data types through which real world entities can be defined better
  • All of given y

50. Three main characteristics of "Object Oriented Programming" are

  • Encapsulation, inheritance, polymorphism y
  • polymorphism, overloading, overriding
  • encapsulation, inheritance, dynamic binding
  • None

51. In ___ sender of a message does not need to know exact class of the receiver.

  • Inheritance
  • Encapsulation
  • Overloading
  • None y

52. Which of the following is not a major element in an object model?

  • Abstraction
  • Encapsulation y
  • Persistance
  • Hierarchy

53. Member functions defined inside a class declaration are ___ by default.

  • Visible
  • Public y
  • Private
  • Protected

54. Consider the following class:
class A
{
int a, b, c;
public:
A():b(10),c(0),a(7){}};
Choose the correct order of initialization of above data members.

  • a, c, b
  • b, a, c
  • a, b, c
  • c, a, b

55. If a class A inherits from class B, then class A is called ___

  • Child class
  • Base class
  • Parent class y
  • Super class

56. We can create array of objects if we have a user defined constructor.

  • True
  • False

57. A class has ___ destructor.

  • No
  • One
  • Two
  • Three

58. ___ is creating objects of one class inside another class.

  • Association
  • Composition
  • Aggregation
  • Inheritance

59. Constant data members can be initialized by using:

  • Constant Member Function
  • Non-constant Member Function
  • Member initializer List
  • Class

60. The sub-object's life is not dependant on the life of master class in ___

  • Composition
  • Aggregation
  • Separation
  • None

61. When we create objects, then space is allocated to:

  • Member functions
  • Access specifier
  • Data members
  • None

62. The dot operator (or class member access operator) connects the following two entities (reading from left to right):

  • A class member and a class object
  • A class object and a class
  • A class and a member of that class
  • A class object and a member of that class

63. In object oriented programming, disadvantage of inheritance include:

  • It provides a useful conceptual framework
  • It avoids rewriting a certain piece of code
  • It facilitates the class libraries
  • It provides independence of classes

64. An abstract class shows ___ behavior.

  • Overriding
  • Specific
  • General 
  • Overloading

65. If some of objects exhibit identical characteristics, then they belong to:

  • Different classes
  • Multiple classes
  • Same class
  • Abstract class

66. Through interface we access object's ___

  • States
  • Data members
  • Behavior
  • Class

67. Object can be declared constant with the use of Constant keyword.

  • True
  • False

68. If we extend our model, and the rest of model is not affected, then it is called ___

  • Consistency
  • Flexibility
  • Efficiency
  • Reusability