Ocado Retail interview questions

First stage was a phone screening call, in which I was asked straightforward questions about my qualifications (past work experience, proficiency in software like SQL, Excel) Second stage was an interview with the Hiring Managers (there were two of them). I was asked questions about my work experience and how they relate to this specific position. After that, they proceeded to ask questions like "what kind of data would you need if you were to analyse the impact of a promotion". The third and final stage was a 2h interview. In the first hour, I was given an Excel file with some data and questions I had to answer. I was asked to do a short presentation addressing those questions (pretty straightforward, no need for fancy graphs). The second hour involved the discussion of my answers and what was the rationale behind them.