It seems to depend. On what I am not exactly sure. For me they simply told me that I was hired and that I was in the pool for a september class. Others have been told what to expect. With one exception, everyone that I interviewed with (who was hired)was put into a pool.
I think it depends. I just got the call and it sounds like I am in a hiring pool. "congrats you are hired we will call you in a week or two for a class date. It looks like it will be in sept." That is all I know. In the past it sounds like they tell peopel what they are getting. I have heard that j41 classes start on a friday and CRJ-FRJ classes start on Mondays. I am not sure how true that is.