The standard questions were asked and I was hired, or at least I received correspondence indicating such. Imagine going through the background test and a drug screen only to find that you were an alternate, or contingent hire, in case someone didn't show up in class on day one.
Should you make it to the interview stage, save yourself wasted time and energy by making sure that you are an actual hire, not a alternate or contingent hire, unless that doesn't matter to you. Otherwise. good luck.