After an initial phone interview I was summoned to a face to face meeting.

The client paid a contribution to my travelling expenses plus 2 nights in a hotel.

The interview lasted 3 hours. No coffee was offered. One of the interviewers failed to attend.

There was also a comprehension test on some software specifications. I pointed out that the specifications could be considerably simplified. (Maybe this was not the expected answer!).

There were some stimulating in depth technical questions asking me about how I would go about implementing some code for a non volatile RAM emulator using EEPROM.