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Data Scientist Senior Interview Questions

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3,368 data scientist senior interview questions shared by candidates

Basic probability & stats questions -- just go through the book Practical Statistics for Data Scientists & Brilliant.org and you'll be all set. But make sure to brush up on PM knowledge as well, since this seems to be what they're really looking for.
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Senior Data Scientist

Interviewed at Glassdoor

3.9★
Dec 29, 2018

Basic probability & stats questions -- just go through the book Practical Statistics for Data Scientists & Brilliant.org and you'll be all set. But make sure to brush up on PM knowledge as well, since this seems to be what they're really looking for.

Can you explain what the pseudo-code below is trying to do? array[N] # array of N integers, indexed 0 to N-1; # assume it’s populated with [1,4,2,-2,-9,10,2,12,2,-4,-4,-4,-4,2,6,7] peak = array[0] index = 0 output = [] # array of tuples For x in 1..N-1 if (array[x]*array[x-1] > 0) if peak < 0 and array[x] < peak peak = array[x] index = x if peak >= 0 and array[x] > peak peak = array[x] index = x else output.insert( (index, peak) ) peak = array[x] index = x end if end for return output
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Senior Data Scientist

Interviewed at PriceLabs

4.5★
Dec 15, 2023

Can you explain what the pseudo-code below is trying to do? array[N] # array of N integers, indexed 0 to N-1; # assume it’s populated with [1,4,2,-2,-9,10,2,12,2,-4,-4,-4,-4,2,6,7] peak = array[0] index = 0 output = [] # array of tuples For x in 1..N-1 if (array[x]*array[x-1] > 0) if peak < 0 and array[x] < peak peak = array[x] index = x if peak >= 0 and array[x] > peak peak = array[x] index = x else output.insert( (index, peak) ) peak = array[x] index = x end if end for return output

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