Given a cube and a random walker on the cube, find the expected value of the # of steps that the random walker takes to reach the opposite vertex of the cube.
Data Scientist Interview Questions
40,238 data scientist interview questions shared by candidates
If a jar has X red balls and Y blue balls, what is the minimum number of draws that is necessary to ensure that you have one ball of each color?
Technical Interview Questions: What are the assumptions for Linear Regression? What is a Random Forest? How is a decision tree built?
What’s the probability of a type 1 error. What happens when the sampling distribution is altered (e.g. filtering out all values below the mean) and how does it effect type 1 errors.
Write a program in Python to calculate tax if Salary and Tax Brackets are given as list in the form [ [10000, .3],[20000, .2], [30000, .1], [None, .1]]. You don’t know in the beginning how many tax brackets are there. You have to test for all of them.
Given an event-level table of interactions between pairs of users (note that there aren't duplicates in one day for one pair of users), for each possible number of "people interacted with" find the count for that group in a given day (i.e. 10 people interacted with only one person, 20 with 2, etc.).
What is the expectation of the variance?
How can Facebook figure out when users falsify their attended schools?
Measure difference between two vectors
What machine learning model would you use to classify fraudulent transactions on credit cards?
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