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Data Interview Questions
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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?
About Machine learning basic regression
About FE
Let's say you finished developing a machine learning model and you are getting 95% accuracy. Should you be happy?
Can you explain what regularization is. What's the difference between L1/L2 regularization
How to measure distance between data point?
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