LG Placement Paper -: Object-oriented programming (OOP) Questions And Answers

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1. QUESTION: Which of the following is not an extension associated during the creation of a C++ program?

   A: .cpp

   B: .exe

   C: .jpg

   D: .bak

   Ans: C

2. QUESTION: Why every program begins with main() in C++?

   A: As this is from the compiler knows that program execution actually starts.

   B: Because its name is main

   C: Both A and B

   D: None of above

   Ans: A

3. QUESTION: The wrapping up of data and functions into a single unit is called?

   A: Inheritance

   B: Polymorphism

   C: Encapsulation

   D: Overloading

   Ans: C

4. QUESTION: The process by which objects of one class acquire the attributes of another class is known as?

   A: Inheritance

   B: Polymorphism

   C: Data Abstraction

   D: Binding

   Ans: A

5. QUESTION: The technique by which objects communicate with each other is called?

   A: information passing

   B: function passing

   C: message passing

   D: none of above

   Ans: B

6. QUESTION: Which of the following is false?

   A: Variable has scope & visibility

   B: Variables having scope may not be visible

   C: Variables having visibility may not have scope

   D: None of these

   Ans: C

7. QUESTION: For a method to be an interface between the outside world and a class, it has to be declared?

   A: private

   B: protected

   C: public

   D: external

   Ans: C

8. What is the error in the following code?

   class t
   {
     virtual void print();
   }
       

   A: No error

   B: Function print() should be declared as static.

   C: Function print() should be defined.

   D: Class t should contain data members.

   Ans: A

9. It is possible to declare as a friend

   A: A member function

   B: A global function

   C: A class

   D: All of the above

   Ans: D

10. How many types of expressions in C++?

    A: 5

    B: 6

    C: 7

    D: 8

    Ans: C

11. QUESTION: Dragons have wings like a bird and scales like a lizard. In object-oriented verbiage, we would say this is an example of?

    A: Multilevel Inheritance

    B: Polymorphism

    C: Multiple inheritance

    D: Aggregation

    Ans: C

12. QUESTION: Which of the following is false about object-oriented?

    A: is block structured language

    B: is not a block structured language

    C: aids in object-oriented programming

    D: is an extension of C

    Ans: A

13. QUESTION: Polymorphism is implemented through which mechanism in C++?

    A: Late Interpretation

    B: Late Binding

    C: Early Binding

    D: Overloading

    Ans: C