Haven't taken the ESPN exam, but the then-sports editor at The Diamondback actually gave me the exam he was going to give to each prospective sportswriter he had on board just after I graduated. It wasn't an easy exam: I got about 30-something right out of 50.
He said as long as someone was roughly in a certain range, that person was fine. Fortunately, I was right in that range.
I don't know how easy or tough that exam was in comparison to the ESPN exam, or how it was structured compared to the ESPN exam, but I feel as though I had the ESPN exam's crotchety older great-uncle.