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How did you handle the situation when you had to assist a colleague in an area outside your responsibilities?

How would you design a recommendation system that tracks a user's music listening behavior and uses that data to suggest new songs or artists that they might enjoy? What features or characteristics would you use to model the user's listening history and how would you incorporate those into your recommendation algorithm?

Can you explain the difference between the standard error of the mean and the standard error of the median?

Please demonstrate how you would develop a function to compute the RMSE for two input arrays.

Can you demonstrate your method for calculating a user's lifetime value?

What are type I & type II errors in hypothesis testing? Which one do you think is worse?

How do you account for the variation between the two groups in an A/B test?

Would you mind telling me what you know about SoFi?

Can you detail how Gradient Descent is utilized in the training process of deep learning models?

Return all the records where the first character is 'H'.