There was 2 round.
First was the introduction round and also elimination round.
And 2nd one was the HR round.
So , first they call me for the 1st round, which was the introduction round, while I was waiting outside the office. After the interview they told me to wait outside, I was waiting patiently, after 2/2.5 hrs they call me for the 2nd round. And that was it. It was my first interview experience. And I enjoyed it.