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Explain the purpose of the X and Y axes in a ROC curve.

Why are you looking for a job at the moment?

How do you manage the challenge of skewed data when evaluating the effectiveness of a model, and which metrics do you rely on?

Describe how you see your career development over the next five years and how PayPal fits into that?

How does the Random Forest technique function in the context of decision-making algorithms?

Share with me a time when you disagreed with a team member.

How can the principle of regression be conveyed to an executive without relying on statistical jargon?

Which optimization algorithms are you acquainted with? Can you discuss strategies for dealing with an optimization task that involves a million variables? Could you walk me through the workings of the simplex method in optimization?

What drew you to PayPal?

How would you approach writing a method to count the elements of a sorted list with -1 as an out-of-range marker, without built-in methods?