I got to know about the interview from a consultancy one day before, so I didn't have enough time to prepare.

Initially, the consultancy people took one round of telephonic interview, of which I was not aware.

I had been preparing for the interview for the past 2 weeks, so it was an easy task to revise in one day.

The interview went fine. It was a panel of 2 people. They asked me some basic Oops questions and other telecom-related questions. I was able to satisfy them with my answers.

At the end, they asked me to design two algorithms, which, with some difficulties, I managed to design successfully.

Immediately after that, I was called for an HR interview. Two days after that, I got the call that my selection was confirmed.

They asked me to write some sample code for a thread executor to manage a pool of 10 threads.