I only had the initial phone screen, but the questions just weren't what they should have been. I have no expectation that people outside the field should understand or even know the names of different languages/programs, but the HR rep very obviously didn't understand the questions or the answers, which made it extremely difficult. When I was supposed to talk about a specific project and how I completed it (or something like that), I brought up R; she clearly didn't know what it was, so I have no idea if she even noted it for the hiring manager. If you hear "R" without knowing about it, do you even know to write the letter down, instead of "are" or "our" or do you just move on without noting it? The woman was perfectly kind and pleasant but the rep shouldn't have been given questions she'd have no way to understand. It was nearly an impossible conversation to have. I can understand that later in the process, as with a company that doesn't have any data people yet so the interviewers are more sales-minded people who wind up asking weird data questions that don't really make sense, but if you want to ask the more specific questions that early on, do a mini-assessment or something instead of a screening call.