Groupon

I spoke to HR on the phone, and they promised to get back to me, but never did. Almost five months later, I received an email regarding the decision, by which time I had already been working at a different and better company for a few months. This

1 phone screen and 4 rounds of onsite interviews. Most questions were about the project, and there were also some algorithm questions. Design a mobile app for college grades. How to make it scalable?

I got the interview through the college career fair. Two engineers interviewed me. The first 20 minutes were resume questions. Then there were two algorithm questions.