If you were building an autocomplete experience, how would you use underlying data to predict the next word a person is going to type?

"I expected a PM interview, but both rounds felt way more like deep ML and post-training screens, with a weirdly competitive vibe and very little context on what success looked like. The role itself sounded kind of insane in scope, like product, engineering, data science, contractor management, and project execution all rolled into one person. The second round was a technical case about improving model precision with a contractor team, and it felt like he had decided pretty quickly because the call ended early. I got a polite rejection saying I was good at what I do but they were looking for something different, and honestly by then I already had a lot of red flags about the setup."