Interview Questions on OOPS in Java

Interview Questions on OOPS in Java help students get a detailed overview of the concept and understand the basics of Java Programming language. Because, OOPS is a significant topic in Java and forms the basis of code creation.

1) The object in a programming language, such as Java, contains —————— and —————-.

A) State and Behavior

B) State and Constructor

C) Behavior and Block

D) Behavior and variable

2) In Java, variables and methods help in —————- and ————— an object.

A) Storing and Manipulating

B) Displaying and Storing

C) Storing and Hiding

D) Disposing and Displaying

3) While creating objects in Java, programmers use the keyword “——————-.”

A) Get

B) Create

C) Display

D) New

4) Object-oriented programming helps in one of the following ways.

A) Executes code efficiently and quickly

B) The program structure to be evident.

C) Removes the need to repeat the code multiple times.

D) All the above

5) Moreover, object-oriented programming enables the software to create —————-.

A) Real-world Objects

B) Contrast objects

C) Miniature objects

D) None of the above

6) Next, API means

A) Application Program Interface

B) Applet Programming Interface

C) Application Programming Interface

D) None of the Above

7) During object creation in Java, all the properties of the —————- will inherit into objects.

A) Variables

B) Sub-class

C) Class

D) None of the above

8) The OOPs concept helps Java to be platform-independent

A) True

B) False

9) While ————– is a blueprint, ———— is an instance.

A) Object and Class

B) Class and Object

C) Object and method

D) Method and object

10) Which programming language is known as procedural language?

A) C

B) C++

C) Java

D) None of the above

11) Among the following, ————— do not relate to the OOPS concept.

A. Polymorphism

B. Type Checking

C. Information Hiding

D. Multitasking

12) In Java, the process where the member functions give access to an object while hiding the exact details or making them private is known as

A. Inheritance

B. Modularity

C. Encapsulation

D. Information Hiding

13) The import statements in Java help to —————–.

A. Import the necessary images

B. Avoids calling methods

C. Directly refer to a class without the use of prefixes

D. Avoid declaring variables

14) The main method in Java helps in —————.

A. Being an entry point for the program

B. Creating scrollbars and buttons

C. Holding the application’s APIs

D. Building a user interface

15) The Inheritance concept ensures —————–.

A. Organizing the data

B. Enhance encapsulation and data-hiding

C. Add additional features to the classes without rewriting them

D. Pass arguments to objects of classes

16) At package level, to access a member function through its own object

A. Cannot be defined

B. Can be either private or public

C. Is compulsorily private

D. Is compulsorily public

17) The derived classes concept is involved in

A. Abstract data types

B. Data hiding

C. Encapsulation

D. Inheritance

18) A constructor helps to ——————.

A. Create a JVM for applets

B. Import packages

C. Initialization of newly created object

D. Free memory

19) ————– is an example of a class.

A. Classroom

B. Bus

C. Breadth

D. Animal

E. Blue

Interview Questions on OOPS in Java: Part II

20) We use class to construct objects in Java

A. True

B. False

21) We use the ————— keyword in Java to define a class.

A. Class

B. New

C. Defines

22) What is the specification or template that defines an object type?

A. A framework

B. A prototype

C. A class

23) OOPs promote the concept of ——————–.

A. Objects

B. Procedures

C. Data

24) When a class becomes a basis for another class, then the class inherits ——————.

A. Only data

B. The methods and messages

C. Data and methods

25) What exactly happens when a message is sent to an object?

A. Assigning a text string to an object

B. Setting of a member variable to that object

C. Calling of a method on that object

26) List some common characteristics of all objects in Java.

A. Methods and messages

B. State and behavior

C. Methods and interfaces

27) Especially, due to the featuring of dynamic method binding, Java exhibits polymorphism.

A. True

B. False

28) To summarize, the object orientation program offers several benefits; list two.

A. Maintainability

B. Polymorphism

C. Flexibility

D. Inheritance

29) The inheriting class cannot override the existing method’s definition by implementing it.

A. True

B. False

30) In class object, the method is

A. notify()

B. equals()

C. clone()

D. wait()

E. concat()

F. compare()

31) The relation between Owner and Car or Customer and Bank Account is an example for ————–.

A. Composition

B. Association

C. Aggregation

D. None

32) In Java, every class is a subclass of ————– class.

A. Object

B. ArrayList

C. Exception

D. Inheritance

33) Finally, interfaces are fast, requiring extra indirection to find the corresponding methods within the class.

A. True

B. False

The above is a list of Interview questions on OOPS in Java. To Know more about Object Oriented Programming concept, click on the link.

The interview questions on OOPs in Java contains 33 questions with multiple choice questions and answers.