Google Staff Data Scientist

I just had a session with a coach who did not conduct a proper interview in the format I requested. I put in a request for a Google Product Data Science mock that focused on experimentation at the L5 level. I had just had two very helpful session with different Google coach just a few days prior, so I really trusted the quality and competence of Prepfully coaches From the moment my session started, it felt clear there's a misalignment. My coach stated that she worked in Business and Marketing Data Science at Google rather than Product data science but insisted that she would be able to do a Product experimentation case. She started by asking a business question and kept drilling into it. About 10 minutes in, I paused and called out that this was not at all what I asked for and repeated that I wanted to do an experimentation case. We spent 10-15 minutes trying to even understand the case itself (A Pinterest style board for YouTube playlists instead of scroll. When videos are added, thumbnails get smaller rather than a list getting longer). It was during this time that I suggested we cut our session short because she wasn't aligned with what I was looking for but she kept insisting that she knew product too. Her follow up questions throughout the case made it clear that she was not familiar with the format of this round. For instance, she suggested randomizing user level features (YouTube saved playlists) at the session level to be able to reduce time to run an experiment. If I followed her suggestions, I would most certainly have failed the case. I did not gain any learnings from this session, and would like a full refund for this session.

The coach was very unhelpful and was just using the session to advertiser her product/ services.