Senior Java Developer Tech Lead Interview Questions

What are transaction isolation levels and what problems do they solve?

What is the contract between equals() and hashCode() in Java?

How can you fetch a lazily initialized collection within a query? (Follow-up: JOIN FETCH)

How does Spring manage transactions behind the scenes? How would you manage it manually? (Follow-up: Using EntityManager with a try-catch block for commit/rollback)

Senior Java Developer

Interviewed at CDK Global

3.4★

Jun 20, 2018

design and coding questions

Sr Java/Spring Developer

Interviewed at Maxxton

3.7★

May 2, 2023

Questions on Java, SpringBoot, Microservices, REST, etc.

Senior Java Developer

Interviewed at OpenBet

3.1★

Apr 1, 2024

Solid principles, rest principles, hash code, types of list, concurrency, sql, previous and current roles

Senior Java Developer

Interviewed at HSBC

3.8★

Oct 30, 2025

OOps concepts with real coding sepacialy inheritance,abstraction related, Diff b/w camparable and comparator, Hashmap and concurrentHashmap difference, collectiones diagram, String code, Spring Security

Senior Java Developer

Interviewed at HSBC

3.8★

Mar 9, 2021

Why work in HSBC? Microservice components (config-server, api-gateway, service-discovery)? Difference between a container and a VM? What happens with the following code?

Senior Java Developer

Interviewed at HSBC

3.8★

Sep 18, 2024

What does immutable means? Also some about spring beans