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Companies: Apple Difficulty: Easy Frequency:  Low Question Is the base tree in gradient boosting trees deep or shallow? Answer Gradient boosting trees (GBTs) are built with shallow (weak learners). These shallow…

Companies: Amazon Difficulty: Easy Frequency:  Medium Question What are random forest and gradient boosting trees? Answer This question is a more specific question to the Bagging vs Boosting. Since this question…

Companies: Amazon Difficulty: Easy Frequency:  High Question Is feature scaling necessary for training decision trees? Answer Tree-based models are independent of feature scale. The reason for this is that the node…