If you had 3 mins alone in a lift with the CEO what would you say?
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Data challenge was very similar to the ads analysis challenge on the book the collection of data science takehome challenge, so that was easy (if you have done your homework). SQL was: you have a table where you have date, user_id, song_id and count. It shows at the end of each day how many times in her history a user has listened to a given song. So count is cumulative sum. You have to update this on a daily basis based on a second table that records in real time when a user listens to a given song. Basically, at the end of each day, you go to this second table and pull a count of each user/song combination and then add this count to the first table that has the lifetime count. If it is the first time a user has listened to a given song, you won't have this pair in the lifetime table, so you have to create the pair there and then add the count of the last day. Onsite: lots of ads related and machine learning questions. How to build an ad model, how to test it, describe a model. I didn't do well in some of these.
what do you think will be the most difficult for you if you get the job
Given a number find it is one less than the power of two.
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Have you ever told a subordinat to do something and found out latter it was wrong? How did you correct it?
What are the three most important qualities in a leader?
If you were a fruit what would you be and why?
From the in-person panel interviews: - Uber is opening up a city remotely (i.e. Milwaukee will be operated out of Chicago). How would you make the drivers in Milwaukee feel equal to the drivers in Chicago. This was maybe the worst, most vague question of them all. - Uber drops you in a new market (i.e. Oklahoma City) and says you have two weeks until we open here - go! What do you do? - Say an Uber black car driver makes $30/ride with a 20% commission. How do you convince him to upgrade to a new made up service UberSuper with a 25% commission? What costs will the driver incur in upgrading. How much more will he have to make each week, etc. Note: it's not enough to just walk them through mentally how you'd do this, be prepared to do the math on the fly. Very annoying. - An Uber competitor opens in your city with unlimited cash capital, if you were them how would you steal Uber's customers? If you were Uber how would you convince drivers not to leave?
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