Btw, a test given by a business would be unreliable... businesses don't necessarily teach the same information as they teach you in school. And if you were self taught, you'd be even more clueless, because you wouldn't know what you had to learn. If you were teaching yourself computer science, you might end up learning some C or whatever else, but you probably wouldn't learn about efficiency, coupling, cohesion, and other topics that you wouldn't even think of looking up. Also, you would constantly run into material that you don't understand, because you are only learning it. Understanding it might be easy, but in many cases, it isn't. That's why it's university level, not HS level material. Maybe you are within that .1 % of the smartest people on earth that actually can teach yourself massive amounts of difficult-to-grasp material, and do so fairly quickly (so that you can start a career at a reasonable age). But do you really think businesses should consider this a good option?