Mistake to bring up preference for ML during interview?

I had an interview a while back with a banking company for a data scientist position. The interview was going really well - I answered their questions about model selection and evaluations proficiently and they even mentioned my proposed solution was how they solved one of their own business problems.

Toward the end of the interview I asked if their team focuses heavily on data engineering, or if there is a separate team dedicated to DE. I said that I've …

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