My OBD monitor showed all as OK. My manual says that this means "monitor has completed diagnostic testing." During the emissions inspection, will the mechanic just plug a similar device into my car and check for the same OK readings, Or will he do a more invasive/thorough inspection of the emissions?

I am in North Carolina if that helps. I guess I'm trying to say does OK on my OBD monitor mean my car will DEFINITELY pass the test?