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In what ways do you think measuring monthly retention is important for this company?

Tell me about a time you were challenged when you were in public.

Why have you decided to change your job? Why do you feel Criteo is a good next step?

You observe that a colleague always arrives late to a weekly meeting. What would you do?

Describe an occasion when you took ownership

How would you execute a binary search in code and describe the time complexity? Moreover, can the search be enhanced?

How would you explain a median and what techniques would you use to compute it from an oversized dataset?

How do you evaluate whether a Gaussian mixture model is appropriate for a particular data set?

Could you develop a Python function that applies a markdown to selected song streams?

For those of us not well-versed in decision trees, could you provide an explanation of bias and variance and how they're pertinent? Additionally, could you share with us which of those two is tougher to deal with: high bias or high variance - and why?