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Please provide the code for flipping a binary tree in the language of your choice.

How familiar are you with implementing NLP techniques within recommender systems?

Can you walk me through the normal progression of an ML project from the initial phase to the final phase?

In your experience, what kind of problems can be solved using XGBoosting?

Regarding neural network layers, where does the vanishing gradient issue predominantly take place: at the start or the finish?

Which optimization strategies are within your realm of expertise? What are the best practices for handling optimization problems with a vast number of variables? What does the simplex method entail when addressing optimization challenges?

Can you describe the methods used to address the imbalance in a dataset?

How would you make sure that the most recently used items in a large dataset are readily available to your program?

Identify the words from the list that are anagrams - Lemon and Melon, Astronomer and Moonstarer.

Can you elucidate what batch normalization is and the concept of dropout in neural networks?