OBJECT ORIENTED PROGRAMMING MCQ's SET-3
1. Which feature may be violated if we don’t use classes in a program?
a) Inheritance can’t be implemented
b) Object must be used is violated
c) Encapsulation only is violated
d) Basically all the features of OOP gets violated
Answer: d
2. How many basic features of OOP are required for a programming language to be purely OOP?
a) 7
b) 6
c) 5
d) 4
Answer: a
3. The feature by which one object can interact with another object is _____________
a) Data transfer
b) Data Binding
c) Message Passing
d) Message reading
Answer: c
4. ___________ underlines the feature of Polymorphism in a class.
a) Nested class
b) Enclosing class
c) Inline function
d) Virtual Function
Answer: d
5. Which feature in OOP is used to allocate additional function to a predefined operator in any language?
a) Operator Overloading
b) Function Overloading
c) Operator Overriding
d) Function Overriding
Answer: a
6. Which among doesn’t illustrates polymorphism?
a) Function overloading
b) Function overriding
c) Operator overloading
d) Virtual function
Answer: b
7. Exception handling is a feature of OOP.
a) True
b) False
Answer: a
8.Which among the following, for a pure OOP language, is true?
a) The language should follow 3 or more features of OOP
b) The language should follow at least 1 feature of OOP
c) The language must follow only 3 features of OOP
d) The language must follow all the rules of OOP
Answer: d
9. Does OOP provide better security than POP?
a) Always true for any programming language
b) May not be true with respect to all programming languages
c) It depends on type of program
d) It’s vice-versa is true
Answer: a
10. What do you call the languages that support classes but not polymorphism?
a) Class based language
b) Procedure Oriented language
c) Object-based language
d) If classes are supported, polymorphism will always be supported
Answer: c
11. If same message is passed to objects of several different classes and all of those can respond in a different way, what is this feature called?
a) Inheritance
b) Overloading
c) Polymorphism
d) Overriding
Answer: c
12. Which type of function among the following shows polymorphism?
a) Inline function
b) Virtual function
c) Undefined functions
d) Class member functions
Answer: b
13. In case of using abstract class or function overloading, which function is supposed to be called first?
a) Local function
b) Function with highest priority in compiler
c) Global function
d) Function with lowest priority because it might have been halted since long time, because of low priority
Answer: b
14. Which among the following can’t be used for polymorphism?
a) Static member functions
b) Member functions overloading
c) Predefined operator overloading
d) Constructor overloading
Answer: a
15. Which among the following can show polymorphism?
a) Overloading ||
b) Overloading +=
c) Overloading <<
d) Overloading &&
Answer: c
16. Polymorphism is possible in C language.
a) True
b) False
Answer: a
17. Which problem may arise if we use abstract class functions for polymorphism?
a) All classes are converted as abstract class
b) Derived class must be of abstract type
c) All the derived classes must implement the undefined functions
d) Derived classes can’t redefine the function
Answer: c
18. Which among the following is not true for polymorphism?
a) It is feature of OOP
b) Ease in readability of program
c) Helps in redefining the same functionality
d) Increases overhead of function definition always
Answer: d
19. Which among the following best describes encapsulation?
a) It is a way of combining various data members into a single unit
b) It is a way of combining various member functions into a single unit
c) It is a way of combining various data members and member functions into a single unit which can operate on any data
d) It is a way of combining various data members and member functions that operate on those data members into a single unit
Answer: d
20. If data members are private, what can we do to access them from the class object?
a) Create public member functions to access those data members
b) Create private member functions to access those data members
c) Create protected member functions to access those data members
d) Private data members can never be accessed from outside the class
Answer: a
