How would you correlate each device a person visits the website with back to that person?
Data Scientist Interview Questions
33,418 data scientist interview questions shared by candidates
If you had 1000 factors for a ML model, how would you go about reducing this and how would you know when to stop. reducing
Two random variables have a uniform distribution between 0 and 1. What will be the expected value of the difference of these variables?
What is maximum likelihood estimation?
Imagine you have N pieces of rope in a bucket. You reach in and grab one end-piece, then reach in and grab another end-piece, and tie those two together. What is the expected value of the number of loops in the bucket?
Given two tables with the following columns: USERS user id date time stamp post id user action action details POST_REMOVED_BY_REVIEWER post id date time stamp report the daily ratio of posts removed by reviewers out of the user reported posts (user action = report)
Suppose likes are down 2% but engagement is up 5%. Is that good?
What is AUC? What lies on x-axis and y-axis of AUC curve?
Describe different JOINs in SQL. Having a categorical variable with thousands distinct values, how would you encode it? How to find linear trends in time series. How to find the flow in a matrix showing temperature. ...
Quelles sont les défauts que votre mère vous reproche?
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