I'm trying to find the original source for this, but there's a quote I've seen about how finding a cycle in a linked list used to regarded as a FizzBuzz like test. It came of age when most people worked in C - if you worked in C for a year you'd know that cold.

I wonder how much the technical question approach isn't so much wrong as it is testing for things that matter much less now. There don't seem to be many questions about concurrency and distributed systems in this kind of interview, or at least not good ones. Everything now is "it depends" and the hard solutions are about ten lines of code for ten pages of problem explanation.