Developer Java Backend Interview Questions

Backend Engineer (Java)

Interviewed at Ambush

4.3★

Oct 3, 2023

Me convença do porquê eu deveria ter testes automatizados no meu projeto.

Java Backend Engineer

Interviewed at Aurionpro Solutions

3.6★

Jul 8, 2025

They asked me in cache if we are using hashmap then in multi threading environment the cached data get inconsistent so for that what data structure we can use?

Java Backend Engineer

Interviewed at Trustly

3.8★

Mar 17, 2021

Na prova prática, me perguntaram o que poderia ser melhorado.

Java Backend Engineer

Interviewed at Unicommerce Esolutions

4★

Mar 6, 2024

Core Java concepts and 1 DSA question

Senior Backend Engineer-Java

Interviewed at Binance

4★

Apr 9, 2023

How do you deal with async requests to a 3rd party service?

Senior Backend Java Engineer

Interviewed at Wise

3.7★

Feb 19, 2026

Circuit breaker implementation in Java: The service A calls service B and service C every time. If one service fails 3-times in 10 minutes ( or 20 seconds in the implementation) the next call will be blocked for 5 minutes (10 seconds in the implementation). There was given a simulation of remote method calls, I needed to implement only the execute() which calls the remote service if possible.

Senior Backend Software Engineer (Java)

Interviewed at Zalando

3.6★

Oct 29, 2024

really simple ordering and sum price in static data structure

Java Backend Developer

Interviewed at Ocado Technology

3.7★

Jul 21, 2019

Code review a provided implementation of a Stack

Senior Java Backend Engineer

Interviewed at Deutsche Bank

3.8★

Jan 27, 2026

You receive 50,000 products in a GET API request body. Will you accept it?

Java Backend Developer

Interviewed at T-Systems

3.8★

Jul 20, 2018

What is the internal working of Map