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Top 20+ Java Coding Interview Questions and Answers

28/Jul/2021 | 5 minutes to read


Here is a List of essential Java Coding Interview Questions and Answers for Freshers and mid level of Experienced Professionals. All answers for these Java Coding questions are explained in a simple and easiest way. These basic, advanced and latest Java Coding questions will help you to clear your next Job interview.

Java Coding Interview Questions and Answers

These interview questions are targeted for Java Coding for Developers. You must know the answers of these frequently asked Java Coding interview questions to clear the interview.

1. Implement Stack in Java.

2. Implement LinkedList in Java.

3. Implement Doubly Linked List.

4. Write a program to reverse a string.

5. How to find the circular point of a Linked List?

6. How will you find the frequency of each word of paragraph?

7. Write a program to find the first duplicate in Array.

8. Write a program to occurrence of each character in Java.

9. How to find the middle element in LinkedList?

10. Given a string "dfsdfsd3434", sort this string and print the characters first and digits last.

11. How to delete a node from a linked list?

12. Write a program to build Fibonacci series.

13. Program to Reverse a number in Java.

14. Write a program to print all combinations of a string.

15. Write a program to find the missing number on continues array using binary search

16. Write a program to check if the first string is a subset of the second string.

Some General Interview Questions for Java Coding

1. How much will you rate yourself in Java Coding?

When you attend an interview, Interviewer may ask you to rate yourself in a specific Technology like Java Coding, So It's depend on your knowledge and work experience in Java Coding.

2. What challenges did you face while working on Java Coding?

This question may be specific to your technology and completely depends on your past work experience. So you need to just explain the challenges you faced related to Java Coding in your Project.

3. What was your role in the last Project related to Java Coding?

It's based on your role and responsibilities assigned to you and what functionality you implemented using Java Coding in your project. This question is generally asked in every interview.

4. How much experience do you have in Java Coding?

Here you can tell about your overall work experience on Java Coding.

5. Have you done any Java Coding Certification or Training?

It depends on the candidate whether you have done any Java Coding training or certification. Certifications or training are not essential but good to have.


We have covered some frequently asked Java Coding Interview Questions and Answers to help you for your Interview. All these Essential Java Coding Interview Questions are targeted for mid level of experienced Professionals and freshers.
While attending any Java Coding Interview if you face any difficulty to answer any question please write to us at Our IT Expert team will find the best answer and will update on the portal. In case we find any new Java Coding questions, we will update the same here.