Two or three rounds of phone interviews were followed by the on-site interview.

On site I talked to 2 people. I rather liked them, but after the on-site interview it was no feedback for a week. I contacted them asking about feedback. They said that it was vacation time and they forgot, but people liked me and they wanted to invite me for the second on-site interview. They scheduled the date but I had to wait for over a week again.

By that time other companies made me offers, and I felt that I liked other companies more. I canceled the second on-site interview with Illumio.

They dropped the ball. Candidates wouldn't wait for weeks and weeks for them to move. If they would have made me an offer right after the on-site interview I would have probably already been working there.

Trivial, something about binary tree search. Sorry, I don't remember it now.