Java Back End Developer Interview Questions

Java Back-end Developer

Interviewed at Holidu

4.5★

Oct 24, 2022

How does HashSet work internally?

Java Back-end Developer

Interviewed at Tufin

4.2★

Nov 10, 2019

1. Present a project. 2. Present you a code with bugs and the would like you to make it better with minimal changes! 3. Design a game (cracking the coding interview...)

Java Back-end Developer

Interviewed at SAP

4.2★

Jul 25, 2022

given a string, check if it's a palindrom given a string, check if it's a permutation of a palindrom

Java Back-End Developer

Interviewed at Citi

3.6★

Jul 27, 2010

XML: DOM vs SAX parsers

Java Back-end Developer

Interviewed at Infogain

3.6★

Jul 26, 2022

Find nearest int for a given integer from a integer array

Java Back-end Developer

Interviewed at Josh Software

3.4★

Feb 25, 2025

Java 8 features,Spring Boot , Mricroservices, Security related question, Collection and framework

Java Back-end Developer

Interviewed at Fulcrum Worldwide

4★

Jun 20, 2025

Most of the questions are about spring boot and core java related. may be a online pdf can really help you for more questions. He also ask me for code which is finding 3 greatest no. from an unsorted array.

Java Back-end Developer

Interviewed at Aubay

3.6★

Jul 18, 2023

1. Introduce Yourself. 2. Ennumerarte previous experiences.

Java Back-end Developer

Interviewed at Amaris Consulting

3.3★

Sep 14, 2025

Sobre mi trayectoria, tanto académica como profesional.

Java Back-end Developer

Interviewed at Canva

3.9★

Sep 15, 2021

What is the difference between Java and JavaScript? Some basic knowledge on multi-thread, can't remember. If you have 1000 2d points as a tuple like (x1, y1) how could you store these points and count the number of occurrence of each position efficiently?