Perhaps, but a lot of teaching is done with Python nowadays, and Python has a positive pass-rate, and actually tops the on-site success rate. So it doesn't just

Perhaps, but a lot of teaching is done with Python nowadays, and Python has a positive pass-rate, and actually tops the on-site success rate. So it doesn't just seem to be a case of beginners getting rejected a lot. Based on my anecdotal evidence of interviewing Java devs, I'd suggest the problem is the opposite. While there are some excellent Java coders out there, there are also an awful lot of "experienced" devs, with fifteen years of experience and salary expectations to match, whose technical ability proves to be pretty miserable.