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Datenwissenschaftler Manager Interview Questions

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36,085 datenwissenschaftler manager interview questions shared by candidates

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?
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Senior Data Scientist

Interviewed at Natera

3.8★
May 19, 2015

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)
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Data Scientist

Interviewed at Meta

3.5★
Apr 18, 2020

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)

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. ...
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Data Scientist

Interviewed at Amazon

3.5★
Nov 27, 2019

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. ...

Bayes' Formular: Marbles: There are 30 red marbles and 10 black marbles in Urn #1. You have 20 red and 20 Black marbles in Urn 2. Randomly you pull a marble from the random urn and find that it is red. What is the probability that it was pulled from Urn #1
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Data Scientist

Interviewed at Zenefits

3.8★
Dec 17, 2016

Bayes' Formular: Marbles: There are 30 red marbles and 10 black marbles in Urn #1. You have 20 red and 20 Black marbles in Urn 2. Randomly you pull a marble from the random urn and find that it is red. What is the probability that it was pulled from Urn #1

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