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  • 28th Jul, 2020


Following are mostly asked Oops MCQ test that are designed for professionals like you to crack you interviews. You can take this Oops online test before appearing to you real interview. This Oops quiz there are around 30+ multiple choice questions on Oops with four options.

1) OOPs stands for __.

  • A. Object Oriented Programming System
  • B. Object Oriented Program System
  • C. Object Orienting Programming System
  • D. None of the above

2) Which of the following is not concept of OOPS in Java?

  • A. Inheritance
  • B. Encapsulation
  • C. Polymorphism
  • D. Compilation

3) Which concept of Java is achieved by combining methods and attribute into a class?

  • A. Encapsulation
  • B. Inheritance
  • C. Polymorphism
  • D. Abstraction

4) Which of the following is not a type of constructor?

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

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

  • A. Data hiding
  • B. Dynamic Typing
  • C. Dynamic binding
  • D. Dynamic loading
Download Free : OOPs MCQ PDF

6) ___ refers to the ability of a variable, function or object to take on multiple forms.

  • A. Polymorphism
  • B. Inheritance
  • C. Abstraction
  • D. Encapsulation

7) Who developed object-oriented programming?

  • A. Adele Goldberg
  • B. Dennis Ritchie
  • C. Alan Kay
  • D. Andrea Ferro

8) Which of the following language supports polymorphism but not the classes?

  • A. C++ programming language
  • B. Java programming language
  • C. Ada programming language
  • D. C# programming language

9) Define the programming language, which does not support all four types of inheritance?

  • A. Smalltalk
  • B. Kotlin
  • C. Java
  • D. C++

10) Which function best describe the concept of polymorphism in programming languages?

  • A. Class member function
  • B. Virtual function
  • C. Inline function
  • D. Undefined function

11) What is the extra feature in classes which was not in the structures?

  • A. Member functions
  • B. Static Data allowed
  • C. Data members
  • D. Public access specifier

12) Which of the following class is known as the generic class?

  • A. Final class
  • B. Template class
  • C. Abstract class
  • D. Efficient code

13) The principle of abstraction ___.

  • A. is used to achieve OOPS
  • B. Use abstraction at its minimum
  • C. is used to avoid duplication
  • D. is used to remove longer codes

14) Which feature allows open recursion, among the following?

  • A. Use of this pointer
  • B. Use of pointers
  • C. Use of pass by value
  • D. Use of parameterized constructor

15) Can we overload constructor in derived class?

  • A. Yes
  • B. No

16) __ keyword is used to inherit a class or abstract class.

  • A. extends
  • B. implement
  • C. super
  • D. None of the above

17) An Abstract Method does not have a body.

  • A. True
  • B. False

18) Which of the following is Access Modifiers in OOPs?

  • A. private
  • B. public
  • C. protected
  • D. All of the above

19) Which of the following is not related to OOPS?

  • A. Structure and Union
  • B. Class and Object
  • C. Constructor and Destructor
  • D. Inheritance and Polymorphism

20) Is Constructor can return a value?

  • A. Yes
  • B. No

Oops Online Test Questions (Oops FAQs)

1) What is oops?

The OOPS is a short form of object-Oriented programming which is a programming paradigm that depends on the classes and objects concept.

2) What is private member of a class?

The members of the class are the private one which is accessed by the member functions within the class. They cannot be accessed directly by any function or subject outside the class.

3) What is an object?

In object-oriented programming (OOP), an object is an abstract data type created by a developer. It can include multiple properties and methods and may even contain other objects.

4) What is default visibility of class members in Java?

The default visibility of class members in Java is package is package-private - visible only from the same package

5) What is encapsulation in oops?

This is a fundamental concept that you can find in object-oriented programming. It demoinstrtates the bundling data idea and the way that work on the data within a single unit like a class present in Java.

6) What is inheritance?

In Object-oriented programming, it is possible for the classes for inhering the state and behaviour which are commonly used from the other classes. Java Inheritance is a mechanism where the object needs all behaviours and properties of the parent object.

7) List some limitations of OOPs?

Diamond inheritance problems, Steep learning curve, and complexity of creating programs are the some limitations of OOPS programming.

8) What is method overloading?

If a class comes with different ways with same name but in parameters difference which is called Method Overloading. To perform only an operation or having some methods name increases the program readability.

9) What is a virtual function?

A virtual function is a member function which is declared within a base class and is re-defined(Overriden) by a derived class. Virtual functions ensure that the correct function is called for an object, regardless of the type of reference (or pointer) used for function call.

10) Is java is pure object oriented language? If not why?

No, Java is not the programming language which object oriented. It supports the types of the primitive data and everything which is not Java object.

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