It is a 2 day interview. Computer aeronautical knowledge, math, memory, instrument interpretation, psych. eval, and coordination test ( keep the ball centered while you climb and turn. Interview usually with a pilot and HR person. Lie detector test, physical and a simulator evaluation. This eval does have a V1 cut.
Begin training any time from 2 weeks - 2 or 3 months after the interview. Subject to change of course.