First, a general interview:

• General questions about you
• Your view on programming
• Explain recursion to a child
• A simple puzzle

After that, two independent technical interviews. The length of each is one hour, but the second interviewer extended their portion to an hour and a half.

The questions:

1. Puzzle: You have 9 stones with equal weight, but 1 is different. You have to find the different stone by weighing twice on a libra.
2. Find a way in a maze.
3. Bull's Eye game.
4. Design an interface with low methods complexity.