Let's look at the Top 50 NBA players and see how many of them (without looking) you know where they went to school. And be honest if it's a case of 'let me think about it....oh yeah, he's from [school]' or more of an immediate association

rankings from TheRinger

Overall, I got 34/50 (68%) correct.  I was 7/8 (87.5%) on foreign countries, 1/1 on High School and 26/41 on colleges (63.4%).  The ones that were most associated for me tended to be foreign nationalities or #1 picks.

I was substantially more accurate for the Top 10 (10/10, 100%) and even the Top 25 (22/25, 88%) than I was overall (the aforementioned 68%) with only 12/25 (48%) correct for the 26-50th ranked players