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Write a tool/function for reversing a string.

Consider an array of sorted integers from 0 to n and find the problematic integer. Provide a function that satisfies this requirement with a time complexity of O(log n).

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?

Could you design a function that searches for all anagrams derivable from a single string?

Considering that you already have labelled data for your clustering project, what are some of the methods that you can use to evaluate model performance?

Could you walk me through the process you'd follow to find all English words within a given block of text?

Distinguishin between bias and variance and describing how they affect machine learning?

What kind of factors would you consider when building a metric to compare two user's Netflix recommended lists of movie/tv show preferences?

In your opinion, what makes feature selection so significant in the context of machine learning?

How would you go about coding a functional hash table in Python?