Aristocrat Test Engineer interview questions

I applied online, I had HR typical screening phone interview. I was then set for an interview with the hiring manager and two engineers for an hour and half. The hiring manager was engaging, and the technical interview with the two engineers went very positive and I answered all questions correctly. I was almost certain that I got the job, I was surprised after following up with HR that they are continuing the search.

Interview was carried in 3 rounds. First screening with multiple McQ. Second technical and third discussion with manager. last was the HR round which happened in 2 phases. Final offer was discussed over call. Process took 3 days.