When I started interviewing programmers in 1991, I would generally let them use any language they wanted to solve the coding problems I gave them. 99% of the time, they chose C.

Nowadays, they tend to choose Java.

Now, don't get me wrong: there's nothing wrong with Java as an implementation language.

...

Instead what I'd like to claim is that Java is not, generally, a hard enough programming language that it can be used to discriminate between great programmers and mediocre programmers. It may be a fine language to work in, but that's not today's topic. I would even go so far as to say that the fact that Java is not hard enough is a feature, not a bug, but it does have this one problem.