How Long Should You Expect to Prepare?

You wante to have as many talking points as possible to avoid those awkward silences. If you're interviewing with a hiring manager or someone that is a subject matter expert in a different area, i think preparing accordingly. Looking on linkedon, look at their linked en page, see where they went to college, see what they do. And if they have any description of what their current job is,. Look at their career trajectory and how they got to that position.