Just finished taking the test! The gouge was spot on, I would say 70% of the questions are straight from the ATP book and the other 30% are NATs, JFK 31L approach questions, ICAO Metars and TAF, VMCG, Weather Symbols just like previously mentioned. The best tool I used was
Sheppard Air Airline interview test prep its $39 ($19 discount for former ATP subscribers). Good luck to the rest of the guys on the interview.
