Oh yeah, I guess I took it for granted, but if you learn jazz bass throughout high school you're going to learn the bottom four strings because you have to be able to read the scores (an octave down mind you but the frets stay the same). Oh, plus the top E, same as the bottom E and the B string too if you're playing a 5 string.

I was going to say you don't really have to learn all the notes since the majority of stuff is done using scale patterns, but ... you do have to find out where these patterns start I guess.