Backend Java Developer Interview Questions

Java Backend Software Engineer

Interviewed at eBay

3.9★

Jul 30, 2025

Tell me the difference between SQL and No SQL, and what you use more

Java Backend Developer

Interviewed at Holidu

4.5★

Nov 12, 2024

The difference between int and Integer

Java Backend Developer

Interviewed at King

3★

Nov 2, 2018

What does the parameters in HttpServer.create(...) mean? Are exceptions really necessary or is it just better to pass on error codes?

Java Backend Developer - L4

Interviewed at Incedo

4.2★

Aug 24, 2023

What do you mean by spring transactions?

Backend Java Developer

Interviewed at Micro1

4.5★

Mar 11, 2025

Java core Spring Microservices Rest API

Java Backend Developer

Interviewed at Accenture

3.7★

Jul 3, 2024

How do you do information gathering for a project

Java Backend Developer

Interviewed at BairesDev

4.2★

Feb 15, 2023

Apenas perguntas sobre trabalho atual, experiências com ferramentas relacionadas. Entrevista técnica voltada unicamente ao ecossistema Java e Spring. Não há pegadinhas nem perguntas parecidas com leetcode/hackerrank.

Junior Java Backend Developer

Interviewed at Oracle

3.5★

Oct 23, 2024

Tell me about a situation when you failed at your job.

Java Backend Developer ()

Interviewed at Wissen Infotech

3.8★

Jan 14, 2021

1. Difference between Arraylist and linkedlist. 2. What is the time complexity of insertion in linkedlist? 3. Which one do you prefer in which condition? 4. Which one do you use to insert an array of integers? 5. Given two lists - remove all the elements of second list from first list. 6. Employee class - Employee1 emp1 = ID:1, name : ABC Employee2 emp2 = ID:1, name : ABC Treemap map = new TreeMap<>(); map.put(emp1,7); map.put(emp2,8); Is this allowed? What will be the size of the treemap in this case? 7. Internal implementation of put method in treemap. 8. Internal implementation of hashcode and equals in object class. 9. Time complexity of removeAll() in Linkedlist