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What do you think could be the reasons for the difference in conversion rates between the two groups in an A/B test?

When confronted with a high-dimensional dataset in a machine learning problem, what would be your plan of action?

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

Can you discuss the concept of bootstrapping and your view on its application for sample size enhancement?

Find longest substring without any repeated characters.

What are some of the optimization techniques you’ve worked with or studied? What is your methodology for optimizing a function that includes a million variables? Can you describe the procedural steps of the simplex method used for optimization?

What methods would you employ to optimize an underperforming SQL query?

How would you define perceptron in a simple way?

Explain the concept of regularization in machine learning.

Let me know about the time you failed in your efforts to achieve something.