The round started with introduction from both sides. 
The interviewer explained what their team does and what is their current project. 
Then I was asked about my current role, my tech stack.

A few questions that I remember from this round - 
1. I was given a few examples of Strings and was expected to give the output for each of the comparison. 
The examples included typical string comparison using == and equals() method. 
The discussion naturally shifted towards String Constant Pool.
2. Internal Working of a Hashmap - how to implement it using an array and a bit of discussion about load factor.
3. I was given an problem statement to write a simple nested SQL query to fetch some data about employees from an Employee table.
4. Covered a bit about my projects, a bit about my experience with Maven, Jenkins and questions around.

Verdict: I cleared this round and got a call for 2nd round 2 days later.

Start of Round 2 was very similar to how Round 1. 
Started with introduction from both sides. 
The interviewer briefly mentioned about his role in the team.
Then I was asked about my current role, my tech stack 

Some questions that I remember from this round - 
1. A few pointers from my resume were discussed around - defect fixing, concurrency issues, recent technical challenges that I faced.
2. I had to design a reusable JAR library that can be used across multiple services.
3. How to fetch the Top K users that are logging into a website on a particular day.
What design decisions and algorithms would you choose to solve this proble if millions of users are logging into your website in a single day.

A few other qustions were asked that I cannot recollect now. 

Verdict : The round went okayish, not as good as the first round. 
I was contacted by the recruiter after 2-3 days and a third round was scheduled.

This was a typical Hiring Manager round. 
The HM started with the introduction, project work, and his expections for the job role.

Typical behavioural interview questions were asked.

Verdict: I got a call from the recruiter after 2 days and she mentioned that they are ready to offer. 
Then she asked for documents to come up with numbers for the offer