Senior Java Developer Tech Lead Interview Questions

How are indexes typically implemented in a database like PostgreSQL? (Follow-up: B+ tree)

Can two different objects have the same hash code? What is the impact of a poorly implemented equals() and hashCode()?

What is "flushing" in the context of Hibernate? When does an "auto-flush" typically occur and why?

Senior Software Engineer - Java

Interviewed at DrFirst

4★

Dec 26, 2014

Asked to explain a particular architectural design pattern (was familiar with it but did not know the actual name).

Senior Java Cloud Developer

Interviewed at Rocket Partners

3.9★

Feb 7, 2023

DFS in Java and similar coding exercises. Analyze a poorly written Java API for bugs.

Senior Java Developer

Interviewed at DAZN

2.7★

Apr 29, 2024

. Round technical Asked me permutation of string Minimum element missing in an array I cleared this round

Senior Java Developer

Interviewed at Smarsh

3.5★

Aug 20, 2020

Simple questions related to Java

Senior Java Developer

Interviewed at Maxxton

3.7★

Dec 26, 2018

covert string 123 into number without using integer.parseInt

Senior Java Developer

Interviewed at Infinite Computer Solutions

3.3★

Oct 9, 2023

Spring boot,Core java, collection,Java 8

Senior Java Developer

Interviewed at Shift4

3.4★

Jun 10, 2025

what is your current job description? What are your strengths? What are your weaknesses? And another professional question.