Troy's argument in this episode is that when you are offered a job, you need to ask a lot of very penetrating questions, and just sort of generally act the inquisitor during the interview. This makes sense because Troy often takes jobs and doesn't actually know what he's said agreed to do! Steve, on the other hand, hasn't had a job for years so doesn't know how to be interviewed, or to interrogate a job offerer (is that a word?). It also makes sense to ask lots of questions during the job interview because we want to have a job we like, and it's important to work for (and with) people that are nice.