HCLTech Desarrollador Java Senior interview questions

Recently attended a Java interview for HCL Tech . thought i could share my questions asked- Checked Vs Unchecked exceptions JAVA 8,17,21 features Multithreading basics and advanced like future vs completable future Spring vs Spring Boot Write threadsafe singleton pattern Reverse a list using java stream api, Order list of employees using stream api Write SQL query to group employees by dept using spring data JPA

Easy did not any different or difficult questions and one coding question as well which is just showing repeated alphabets and their count as well for the coding question. That's all the interview i remember which is an easy interview