I prefer to turn it around - there are no testing requirements to get involved in amateur radio, only to transmit. The old rule about "listen before you transmit" applies here too - when I took the radio amateur's exam in the UK I had to do very little studying as I'd already been interested in it for years.
That and cramming for the test means you'll probably forget a lot of the useful stuff which will make your radio career more useful in the future.