Capital One Data Scientist interview questions

coins, string manipulation, define a logit function and input data to compute. how to detect the Fraud with current data problem, you are expecting to answer how to deal with missing value, how to use classification method, which one is good to use?Later there will also be a problem which method is the least useful. What is the effect of FP and FN.How to change the model if the amount (one is large like $1,000,the other is $5) turned out to classified as the same.

implement a function to calculate matrix sum. calculate the probability of coin head