The interview went quite well. They let me know in a couple of days that I'd been accepted. However, one of the problems was that I needed to wait for about 2 months to start because, due to some bureaucracy issues, my rack was closed meanwhile.

After the rack opened, I could start working. I had a phone screen and, after that, a face-to-face interview. The phone screen lasted for about 30 minutes, and the face-to-face was quite long; it lasted for about 2 hours 30 minutes to 3 hours.

How can you swap two integers without using a temporary variable?

Given a tree, perform a special kind of traversal. This is solvable using Breadth-First Search (BFS).