A lot of jobs to which I've applied recently have a "general exam" that you have to go in and take before even starting interviewing processes, etc. These exams usually take 2 - 4 hours, so the thought of wearing formal clothes while sitting there in a chair for 4 hours is very unappealing. These tests are also generally conducted in very large groups of around 40 - 50 people, where the only real contact you have with the conductor is during sign-in.
Does it matter what I wear? Is there any dress code to this type of pre-interview exam or is it just personal preference - whatever you feel comfortable wearing? What I'm really wondering is if the conductors really pay attention, take notes, etc on how potential candidates conduct themselves during these exams or if it's strictly for test scores and nothing else.