One phone screen with hiring manager

Week later scheduled for 3 hrs in-person interview for C2H

Overall the company culture seemed to be like aggressive and micro managed. Anyone can see anyone from corner of the office and hear what you talk. That itself put me off !

Difference between synchronize map vs concurrent map

How is set implemented?

Singleton implementation?

How Hashmap works ?

Coallesce function

Join vs Union

Arraylist vs linkedlist

Microservice – how put is operated with an identifier (URI or payload)

Why is string immutable?

Spring beans scope

SQL Joins/Unions (what and differences)

Some Architecture idiot was asking about Chess board game and how to implement horse move!!! (looks like he is enthusiastic to interview and lose sight of acknowledging interviewee is a person like him) – Clearly this question seemed to infer lack of compassion in the company.

PS: there is some white-boarding stuff, which I hate the most !!!