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Data Interview Questions
132,942 data interview questions shared by candidates
Find out whether an array/string contains non-repeated characters.
Mostly technical / coding questions with limited time to answer, talk about past projects (with techncial depth), almost no questions with respect to data science (statistics, ml, math, modeling ...)
Interviewer: What is the technique to evaluate Logistic regression. I answered Cross entropy. Interviewer: no
Given measurements of acceleration taken from a wristband, with second by second acceleration in the X, Y, Z axis, how would you predict if the person wearing the wrist is sitting, walking or just standing?
Mettez vous à jour des procédures?
We do pre-screening on the data to remove fraud threats -- so how do we find a data sample that we can use to determine a real representation of fraud events.
difference between Python and Scala
private static Map<String, Integer> namesToNumPurchases = new HashMap<String, Integer>() {{ put("Chris", 10); put("Bob", 5); put("David", 5); put("Sue", 12); put("Jim", 3); }}; /* Required output: 3: Jim 5: Bob, David 10: Chris 12: Sue */
From the csv files, how is "A" improved over "B"? Do you have any other findings?
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