Metis Data Science Instructor interview questions

Average difficulty covering the basics of data science such as PCA, regression, NN, etc. First interview was with HR getting a basic feel. Second interview was with one of the execs who hasn't done data science nor finished their Ph.D. Thus, they asked me a technical question that I answered correctly that they implied was incorrect. It was correct since it's part of my current publications. Thus, this exec is not up to date on their data science which makes this company questionable.