Top Java MCQs with Answers for Job Interviews

Last updated by Naina Batra on May 24, 2024 at 11:56 AM | Reading time: 15 minutes

Java Multiple Choice Questions with Answers

This list of MCQ Java interview questions, followed by answers, will provide you with numerous questions on different Java concepts.

Topics are crafted by subject experts for professionals, developers, and engineers to learn and practice to clear their upcoming developer interviews.

Some of the most commonly asked questions at Java interviews are:

Q1. Java programming was invented by:

Dennis Ritchie
Guido Van Rossum
James Gosling
Bjarne Stroustrup

Answer: C. James Gosling

Q2. Which of the following statements is correct regarding Java?

Java is a platform-independent programming language
Java is a code-dependent programming language
Java is a sequence-dependent programming language
Java is a platform-independent programming language

Answer: D. Java is a platform-independent programming language.

Q3. To compile, execute, and debug the Java programs, which component is implemented?

JRE
JDK
JVM
JIT

Answer: B. JDK

Q4. Which of the following is not a feature of Java?

Extensible and dynamic
Portable
Object-oriented
Use of pointers

Answer: D. Use of Pointers

Q5. Which of the following is not used for variable names in Java?

Keyword
Identifier
Keyword and identifier
None of the above

Answer: A. Keyword

Q6. Which one is the extension of Java code files?

.js
.java
.class
.txt

Answer: B. .java

Q7. To set the Java part, which of the following environment variables is used?

JavaPATH
JAVA
JAVA_HOME
Maven_Path

Answer: C. JAVA_HOME

Q8. Which one is not the Java OOPS concept?

Compilation
Inheritance
Encapsulation
Polymorphism

Answer: A. Compilation

Q9. Which of the following types of polymorphism is used in the Java programming language?

Execution time polymorphism
Multilevel polymorphism
Multiple polymorphism
Compile time polymorphism

Answer: D. Compile time polymorphism

Q10. Which of the following is a compiled Java class extension?

.java
.js
.class
.txt

Answer: C. .class

Q11. When Java runs out of memory, which exception is thrown?

MemoryFullException
MemoryError
OutOfMemoryError
MemoryOutOfBoundsException

Answer: C. OutOfMemoryError

Q12. Which, among the following, is a Java selection statement?

Continue
Break
for()
if()

Answer: D. if()

Q13. For finding interfaces in Java, which of the following keywords is used?

Interface
interface
Intf
intf

Answer: B. interface

Q14. Which of the following options isn’t a Java Profiler?

JConsole
JVM
JProfiler
Eclipse Profiler

Answer: B. JVM

Q15. Which package includes the exception stack overflow in Java?

java.util
java.io
java.lang
java.system

Answer: C. java.lang

Q16. How many types of primitive data in Java are present?

6
7
9
8

Answer: D. 8

Q17. Choose the correct size of float and double in Java.

32 and 64
64 and 32
32 and 32
64 and 64

Answer: A. 32 and 64

Q18. In which of the following cases is automatic type conversion possible?

Short to int
Byte to int
Int to long
Long to int

Answer: C. Int to long

Q19. What will be the output of the code given below?

24 I
I
Throws exception
Compile error

Answer: A. 24 I

Q20. What will be the output of the program given below?

-127
129
127
2

Answer: A. -127

Q21. What is received by the method when an array is passed to it?

Length of the array
A copy of the array
Copy of first element
The reference of the array

Answer: D. The reference of the array

Q22. What are arrays in Java?

Objects
Primitive data type
Object references
None

Answer: A. Objects

Q23. When does object creation take place with a new keyword?

Depends on the code
At run time
At compile time
None

Answer: B. At run time

Q24. What is the correct definition of a package?

Collection of classes
Collection of editing tools
Collection of interfaces
Collection of interfaces and classes

Answer: D. Collection of interfaces and classes

Q25. Which keyboard amongst the following options, makes a variable belong to a clause instead of being defined for a specific instance of the class?

Static
Volatile
Final
Abstract

Answer: A. static

Q26. What is the output of the program given below?

0
1
-1
True

Answer: C. -1

Q27. The class string belongs to which of the following?

java.lang
java.string
java.awt
java.applet

Answer: A. java.lang

Q28. What is the return type of a method that doesn’t return any value?

Double
Void
int
None

Answer: B. void

Q29. When a method is involved, where does the system store local variables and parameters?

Stack
Tree
Heap
Array

Answer: A. Stack

Q30. Which of the following options is Runnable?

Interface
Class
Method
Abstract class

Answer: A. Interface

Q31. Which interface is used to declare core methods in Java?

Set
Collection
Comparator
EventListener

Answer: B. Collection

Q32. Which among the following is an incorrect Java feature?

Dynamic
Use of pointers
Object oriented
Architectural neural

Answer: B. Use of pointers

Q33. Which of the following finds and fixes bugs in the program?

JDB
JVM
JDK
JRE

Answer: A. JDB

Q34. In the execution of the divided by zero statement, which of the following exceptions is thrown?

ArithmeticException
NumberFormatException
NullPointerException
None

Answer: A. ArithmeticException

Q35. Under which situation, is the finalize() method called?

Before a variable goes out of scope
Before garbage collection
Before an object goes out of scope
None

Answer: B. Before garbage collection

Our collection of MCQs serves as a valuable tool in your learning journey. You can do a self-assessment before applying to companies for interviews.

By consistently engaging in such activities, you not only solidify your grasp of Java's fundamentals but also hone your problem-solving skills crucial for real-world application development.

Related Articles:

AUTHOR

Naina Batra

Manager, Content Marketing

No items found.

Register for our webinar

How to Nail your next Technical Interview

Step 1

Step 2

Congratulations!

You have registered for our webinar

Oops! Something went wrong while submitting the form.

Step 1

Step 2

Confirmed

You are scheduled with Interview Kickstart.

Redirecting...

Oops! Something went wrong while submitting the form.

Worried About Failing Tech Interviews?

Attend our webinar on
"How to nail your next tech interview" and learn

Hosted By

Ryan Valles

Founder, Interview Kickstart

Our tried & tested strategy for cracking interviews

How FAANG hiring process works

The 4 areas you must prepare for

How you can accelerate your learnings

Register for Webinar

How to Nail your next Technical Interview

Nick Camilleri

Top Java MCQs with Answers for Job Interviews

Contents

Naina Batra

Attend our Free Webinar on How to Nail Your Next Technical Interview

How to Nail your next Technical Interview

Worried About Failing Tech Interviews?

Tools to Enhance Full Stack Development with AI

The Future of Data Science: Emerging Trends and Opportunities

Data-Driven Decision Making: Your Roadmap to Business Success

The Business Impact of Machine Learning: Real-world Case Studies

What is OpenAI? Everything You Need to Know

Mock Interviews for Generative AI: Essential Practice to Land Top AI Roles

Top Python Scripting Interview Questions and Answers You Should Practice

Complex SQL Interview Questions for Interview Preparation

Zoox Software Engineer Interview Questions to Crack Your Tech Interview

Rubrik Interview Questions for Software Engineers

Top Advanced SQL Interview Questions and Answers

Twilio Interview Questions

Ready to
Enroll?

Next webinar starts in

How to Nail your next Technical Interview

You may be missing out on a 66.5% salary hike*

Nick Camilleri

How many years of coding experience do you have?

FREE course on 'Sorting Algorithms' by Omkar Deshpande (Stanford PhD, Head of Curriculum, IK)

How can we help?

Register for Webinar

Read our Reviews

Send us a note

Top Java MCQs with Answers for Job Interviews

Contents

Naina Batra

Attend our Free Webinar on How to Nail Your Next Technical Interview

How to Nail your next Technical Interview

Worried About Failing Tech Interviews?

Tools to Enhance Full Stack Development with AI

The Future of Data Science: Emerging Trends and Opportunities

Data-Driven Decision Making: Your Roadmap to Business Success

The Business Impact of Machine Learning: Real-world Case Studies

What is OpenAI? Everything You Need to Know

Mock Interviews for Generative AI: Essential Practice to Land Top AI Roles

Top Python Scripting Interview Questions and Answers You Should Practice

Complex SQL Interview Questions for Interview Preparation

Zoox Software Engineer Interview Questions to Crack Your Tech Interview

Rubrik Interview Questions for Software Engineers

Top Advanced SQL Interview Questions and Answers

Twilio Interview Questions

Ready to Enroll?

Next webinar starts in

Ready to
Enroll?