Firstly you’d get an email for passing the CV screening and invitation to an assessment around data wrangling and predictive modelling. The language wasn’t specifically asked but they seem to prefer Python. The main points they wanted to see is how you identify what’s wrong with the data (is the data rectangular?) and how you communicate your solution in a non-technical language. The assessment is pretty time-consuming and as I was busy with university work, I couldn’t complete to a high standard. They gave me a constructive feedback after reviewing which no other companies do these days.