Unless you are working in a specific field of needing to know things on this test it is likely even the ones that were taking it would not retain the information for a long time. Do you really think grandma can recite the 9 rules of using a capital letter 40 year later?
Things like this are worthless as most of us have not retained knowledge from our high school days that we aren't using on a regular basis. I'm pretty positive most of us would struggle at world geography if presented with a test without any preparation. I'm sure in my bitchy English teacher asked me about random writing rules right now I would be lucky to get 50%.
It is funny how some of you fall for this crap all the time without using your brain at all, but just following what your dear leader tells you.