How do you test whether a new credit risk scoring model works? What data would you look at?
Science Interview Questions
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given n samples from a uniform distribution [0, d], how to estimate d?
Given that one coupon was used, what is the likelihood that another person will use the coupon - ie. that both of them will use the coupon?
Building a histogram of post reply count in SQL (number of posts with x replies, x+1 replies, etc). Building a table with a summary of feature usage per user every day (keep track of the last action by user and roll that up every day). Basic conditional probabilities (check out brilliant.org for their source of inspiration)
Flip one coin 10 times and obtain one H, what is the p value and null hypothesis?
You randomly draw a coin from 100 coins - 1 unfair coin (head-head), 99 fair coins (head-tail) and roll it 10 times. If the result is 10 heads, whats the probability that the coin is unfair?
As a part of a bigger question: "How do you draw a uniform random sample from a circle in polar coordinates?"
If you give N riders with the probability of P a $5 coupon, what is the expected coupon spend
Given two lists of sorted integers, develop an algorithm to sort these numbers into a single list efficiently.
You have a google app and you make a change. How do you test if a metric has increased or not?
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