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Data Scientist Senior Interview Questions

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3,383 data scientist senior interview questions shared by candidates

Questions during interview: 1- Say you do on-line ads for two different companies, EasyJet and Mercedes. How would you present your results to the board and prove them you did not waste any money? 2- Another question that involves some economic thinking about why profits go down etc. in the on-line ad business. I recommend you review concepts such as Click-Through Rate, Conversion Rate and the auction mechanisms in on-line marketing etc. 3- After Facebook users pass away, their profile pages remain. So today we have some dead users and some users that are still alive. Will the number of dead people ever equal that of the ones that are alive? When will that happen? How would you calculate it?
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Business Intelligence Senior Analyst/Data Scientist

Interviewed at Criteo

3.9★
Nov 4, 2014

Questions during interview: 1- Say you do on-line ads for two different companies, EasyJet and Mercedes. How would you present your results to the board and prove them you did not waste any money? 2- Another question that involves some economic thinking about why profits go down etc. in the on-line ad business. I recommend you review concepts such as Click-Through Rate, Conversion Rate and the auction mechanisms in on-line marketing etc. 3- After Facebook users pass away, their profile pages remain. So today we have some dead users and some users that are still alive. Will the number of dead people ever equal that of the ones that are alive? When will that happen? How would you calculate it?

Q1. Describe a project that you have worked on in the past Q2. Trade-off between True-positive and false-positive rate. Q3. An idiotic question, if you select a point on the ROC curve, how can you determine if that point is statistically different from another point on the curve. Essentially, compare two data points to check for statistical significance.
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Senior Data Scientist

Interviewed at Syneos Health

3.7★
Oct 18, 2023

Q1. Describe a project that you have worked on in the past Q2. Trade-off between True-positive and false-positive rate. Q3. An idiotic question, if you select a point on the ROC curve, how can you determine if that point is statistically different from another point on the curve. Essentially, compare two data points to check for statistical significance.

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