PM: background + product questions (retail digitization); interviewer did not engage with answers

Interviewer asked about my background and some product questions. Interviewer didn't ask any questions about my answers. Felt like a waste of a lot of interview Preparation. I have attended a lot of interviews in my career. One of the few times it felt like a complete waste. Questions included: talk about a problem that you solved at your current role, and how would you digitize the business of a retail store.