How would you build and test a metric to compare two user's ranked lists of movie/tv show preferences?
Data Scientist Interview Questions
40,227 data scientist interview questions shared by candidates
given a table massenger_sends, date | ts | sender_id | receiver_id| message_id | has_reaction Q1) how many unique conversation threads are there ? note that there are threads that sender_id and receiver is inverse. this should be one thread
What is probability of getting one pair of card from 52 deck of cards? How would you improve work hours?
Mapreduce questions
How would you explain a confidence interval to a non-technical audience?
How many high schools that people have listed on their profiles are real? How do we find out, and deploy at scale, a way of finding invalid schools?
We have a product that is getting used differently by two different groups. What is your hypothesis about why and how would you go about testing it?
How to decline the type 2 error using a certain machine learning model.
Give a list of strings, find the mapping from 1-26 for each string that maximize the value for each string. No distingulish between capital letter and lower case, other characters do not count.
You have three fair coins. You repetitively flip all coins together. After each round you remove the coins that show tails. What is the expected number of rounds until you have no coins left to flip?
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