Yes. Interviewees were free to pick any language to attack their problem. We found that interviewees who picked certain languages performed consistently worse during their interviews, and also received worse feedback in their 360-review after working for a year (if they passed).
The bottom languages were:
Java
C++
Php
They also made up the bulk of interviews. I suspect that Java and c++ together accounted for about 75% of all interviews.
Languages like ruby, python and golang increased your chances of passing the interview as well as getting good peer feedback one year on.
More niche languages (rust, erlang etc) didn’t have enough data points to be analysed separately, but if you grouped them they were the choice of the strongest candidates.
The bottom languages were: Java C++ Php
They also made up the bulk of interviews. I suspect that Java and c++ together accounted for about 75% of all interviews.
Languages like ruby, python and golang increased your chances of passing the interview as well as getting good peer feedback one year on.
More niche languages (rust, erlang etc) didn’t have enough data points to be analysed separately, but if you grouped them they were the choice of the strongest candidates.