The interview was focused more on building something useful, rather than solving algorithmic problems. The candidate is free to import any library as required.

The problem given in the first round was carried forward in the second round with some additions. The third round was about general resume discussion and a couple of simple puzzles. The last round was with the hiring manager.

Given a service running on a set of servers, each with an initial success factor, design a load balancer.

Design the same load balancer for the case when the success factor can change dynamically over a period of time.

You have to write the code for both the parts and make a functional demo. The demo can have any interface (CLI/webapp).