It will be like any other interview. They will have a 4-6 page "Questionare" they will ask questions off of, and mark down answers to. Things like...."Can you tell me a time where you had to step up and make a tough decision on your own in a pressure environment?" followed by "What was the total outcome of this situation". The test should come in the form of military time, simple decision making, and the like. After being hired (be sure to tell your friend I said good luck on the job) there will be tests on the CS
system, aircraft parts, and city codes. I do hope that this helps out. Any more questions, please let me know. I did the qusetioning of many new hires at a few different airlines.