1. Online Test. 30 questions and 20 minutes. Senior maths challenge-like questions. I only managed to do 14/30. Got contacted 3 weeks after finishing the test to an on-site interview. 2. On-site interview: 30m consultant interview and 30m CV interview. Nothing related to data science and was interviewed by a partner and manager. The consultant interview involved a case study and some easy calculations. The CV interview just involved the standard competency questions.