Domande di colloquio per Python/Data Engineer presso Revolut

There was a first round of interview with some basic questions from non-technical recruiter with predefined answers, I passed it. Then they sent me the time consuming home task and I rejected to do it and accepted an offer from another company. After a while they contacted me again and I gave a try to do a home task, the task wasn't related to the area of responsibility, I solved all problems correctly but received a reply that some things could be done in a different way though my solution is correct. I could solve it during 3 days but I had only a half of a day and now I know that I will never do home tasks for any sort of company, that's time consuming and doesn't pay off because someone will prefer another solution. E.g. I used cursor loop because it came first to my mind when the interviewer preferred to use common table query because it's more readable and API returned 5xx error codes instead of 4xx. These are the tasks for Data Scientist position.