sinfoera.com – MCQs, Mock Tests | C C C Programming -OOPS Concepts

1 ï»¿Which of the following type of class allows only one object of it to be created?

A Virtual class B Abstract class C Singleton class D Friend class

✅ Correct Answer: 3

2 Which of the following is not a type of constructor?

A Copy constructor B Friend constructor C Default constructor D Parameterized constructor

✅ Correct Answer: 2

3 Which of the following statements is correct?

A Base class pointer cannot point to derived class. B Derived class pointer cannot point to base class. C Pointer to derived class cannot be created. D Pointer to base class cannot be created.

✅ Correct Answer: 2

4 Which of the following is not the member of class?

A Static function B Friend function C Const function D Virtual function

✅ Correct Answer: 4

5 Which of the following concepts means determining at runtime what method to invoke?

A Data hiding B Dynamic Typing C Dynamic binding D Dynamic loading

✅ Correct Answer: 3

6 Which of the following term is used for a function defined inside a class?

A Member Variable B Member function C Class function D Classic function

✅ Correct Answer: 2

7 Which of the following concept of oops allows compiler to insert arguments in a function call if it is not specified?

A Call by value B Call by reference C Default arguments D Call by pointer

✅ Correct Answer: 3

8 How many instances of an abstract class can be created?

A 1 B 5 C 13 D 0

✅ Correct Answer: 4

9 Which of the following cannot be friend?

A Function B Class C Object D Operator function

✅ Correct Answer: 3

10 Which of the following concepts of OOPS means exposing only necessary information to client?

A Encapsulation B Abstraction C Data hiding D Data binding

✅ Correct Answer: 3

11 Why reference is not same as a pointer?

A A reference can never be null. B A reference once established cannot be changed. C Reference doesn,t need an explicit dereferencing mechanism. D All of the above.

✅ Correct Answer: 4

12 cout is a/an __________ .

A operator B function C object D macro

✅ Correct Answer: 3

13 Which of the following concepts provides facility of using object of one class inside another class?

A Encapsulation B Abstraction C Composition D Inheritance

✅ Correct Answer: 3

14 How many types of polymorphisms are supported by C++?

A 1 B 2 C 3 D 4

✅ Correct Answer: 2

15 Which of the following is an abstract data type?

A int B double C string D Class

✅ Correct Answer: 4

16 Which of the following concepts means adding new components to a program as it runs?

A Data hiding B Dynamic typing C Dynamic binding D Dynamic loading

✅ Correct Answer: 4

17 Which of the following statement is correct?

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.

✅ Correct Answer: 1

18 Which of the following correctly describes overloading of functions?

A Virtual polymorphism B Transient polymorphism C Ad-hoc polymorphism D Pseudo polymorphism

✅ Correct Answer: 3

19 Which of the following approach is adapted by C++?

A Top-down B Bottom-up C Right-left D Left-right

✅ Correct Answer: 2

20 Which of the following is correct about function overloading?

A The types of arguments are different. B The order of argument is different. C The number of argument is same. D Both A and B.

✅ Correct Answer: 4

21 Which of the following is correct about class and structure?

A class can have member functions while structure cannot. B class data members are public by default while that of structure are private. C Pointer to structure or classes cannot be declared. D class data members are private by default while that of structure are public by default.

✅ Correct Answer: 4

22 Which of the following concepts means wrapping up of data and functions together?

A Abstraction B Encapsulation C Inheritance D Polymorphism

✅ Correct Answer: 2

23 Which of the following concepts means waiting until runtime to determine which function to call?

A Data hiding B Dynamic casting C Dynamic binding D Dynamic loading

✅ Correct Answer: 3

24 How "Late binding" is implemented in C++?

A Using C++ tables B Using Virtual tables C Using Indexed virtual tables D Using polymorphic tables

✅ Correct Answer: 2

25 Which of the following operator is overloaded for object cout?

A >> B << C + D =

✅ Correct Answer: 2

26 Which of the following is the correct class of the object cout?

A iostream B istream C ostream D ifstream

✅ Correct Answer: 3

27 Which of the following cannot be used with the keyword virtual?

A class B member functions C constructor D destructor

✅ Correct Answer: 3

28 Which of the following functions are performed by a constructor?

A Construct a new class B Construct a new object C Construct a new function D Initialize objects

✅ Correct Answer: 4

29 Which of the following problem causes an exception?

A Missing semicolon in statement in main(). B A problem in calling function. C A syntax error. D A run-time error.

✅ Correct Answer: 4

30 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.

A Inheritance B Polymorphism C Abstraction D Encapsulation

✅ Correct Answer: 2

31 Which of the following is the correct way of declaring a function as constant?

A const int ShowData(void) { /* statements */ } B int const ShowData(void) { /* statements */ } C int ShowData(void) const { /* statements */ } D Both A and B

✅ Correct Answer: 3

32 Which of the following concepts is used to implement late binding?

A Virtual function B Operator function C Const function D Static function

✅ Correct Answer: 1

33 Which of the following statement is correct?

A C++ allows static type checking. B C++ allows dynamic type checking. C C++ allows static member function be of type const. D Both A and B.

✅ Correct Answer: 4

34 Which of the following factors supports the statement that reusability is a desirable feature of a language?

A It decreases the testing time. B It lowers the maintenance cost. C It reduces the compilation time. D Both A and B.

✅ Correct Answer: 4

35 Which of the following ways are legal to access a class data member using this pointer?

A this->x B this.x C *this.x D *this-x

✅ Correct Answer: 1

36 Which of the following is a mechanism of static polymorphism?

A Operator overloading B Function overloading C Templates D All of the above

✅ Correct Answer: 4

37 Which of the following is correct about the statements given below? All operators can be overloaded in C++. We can change the basic meaning of an operator in C++.

A Only I is true. B Both I and II are false. C Only II is true. D Both I and II are true.

✅ Correct Answer: 2

38 What happens if the base and derived class contains definition of a function with same prototype?

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.

✅ Correct Answer: 4

39 Which of the following are available only in the class hierarchy chain?

A Public data members B Private data members C Protected data members D Member functions

✅ Correct Answer: 3

40 Which of the following is not a type of inheritance?

A Multiple B Multilevel C Distributive D Hierarchical

✅ Correct Answer: 3

41 Which of the following operators cannot be overloaded?

A [] B -> C ?: D *

✅ Correct Answer: 3

42 In which of the following a virtual call is resolved at the time of compilation?

A From inside the destructor. B From inside the constructor. C From inside the main(). D Both A and B.

✅ Correct Answer: 4

43 Which of the following statements regarding inline functions is correct

A It speeds up execution B It slows down execution. C It increases the code size. D Both A and C.

✅ Correct Answer: 4

44 Which one of the following is the correct way to declare a pure virtual function?

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

✅ Correct Answer: 3

45 Which of the following header file includes definition of cin and cout?

A istream.h B ostream.h C iomanip.h D iostream.h

✅ Correct Answer: 4

46 Which of the following keyword is used to overload an operator?

A overload B operator C friend D override

✅ Correct Answer: 4

47 Which inheritance type is used in the class given below? class A : public X, public Y {}

A Multilevel inheritance B Multiple inheritance C Hybrid inheritance D Hierarchical Inheritance

✅ Correct Answer: 2

48 Which one of the following is correct about the statements given below? All function calls are resolved at compile-time in Procedure Oriented Programming. All function calls are resolved at compile-time in OOPS.

A Only II is correct. B Both I and II are correct. C Only I is correct. D Both I and II are incorrect

✅ Correct Answer: 3

49 Which of the following is an invalid visibility label while inheriting a class?

A public B private C protected D friend

✅ Correct Answer: 4

50 Which one of the following options is correct?

A Friend function can access public data members of the class. B Friend function can access protected data members of the class. C Friend function can access private data members of the class. D All of the above.

✅ Correct Answer: 4

51 Which of the following statements is correct in C++?

A Classes cannot have data as protected members. B Structures can have functions as members. C Class members are public by default. D Structure members are private by default.

✅ Correct Answer: 2

52 Which of the following is used to make an abstract class?

A Declaring it abstract using static keyword. B Declaring it abstract using virtual keyword. C Making at least one member function as virtual function. D Making at least one member function as pure virtual function.

✅ Correct Answer: 4

53 Which of the following access specifier is used as a default in a class definition?

A protected B public C private D friend

✅ Correct Answer: 3

54 What is correct about the static data member of a class?

A A static member function can access only static data members of a class. B . A static data member is shared among all the object of the class. C A static data member can be accessed directly from main(). D Both A and B.

✅ Correct Answer: 4

55 Which of the following provides a reuse mechanism?

A Abstraction B Inheritance C Dynamic binding D Encapsulation

✅ Correct Answer: 2

56 Which of the following statement is correct?

A Class is an instance of object. B Object is an instance of a class. C Class is an instance of data type. D Object is an instance of data type.

✅ Correct Answer: 2

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C Programming -OOPS Concepts