Lead Data Scientist Interview Questions

344 lead data scientist interview questions shared by candidates

Code review: - Use of one-hot encoding over ordinal encoding - fixing the accuracy, precision, recall calculation, and explaining them - dropping the target before training the model - fitting the model on the train dataset instead of test - explaining the choice of model – random forest classifier, and the number of estimators i.e. trees (hyperparameter) - Why use validation dataset and then predict the test dataset? - Label mismatch in the train and test dataset (additional column in the train dataset) - Missing values in ‘age’ feature - How to handle missing values?
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Lead Data Scientist

Interviewed at Applied Data Science Partners

5
Jul 10, 2024

Code review: - Use of one-hot encoding over ordinal encoding - fixing the accuracy, precision, recall calculation, and explaining them - dropping the target before training the model - fitting the model on the train dataset instead of test - explaining the choice of model – random forest classifier, and the number of estimators i.e. trees (hyperparameter) - Why use validation dataset and then predict the test dataset? - Label mismatch in the train and test dataset (additional column in the train dataset) - Missing values in ‘age’ feature - How to handle missing values?

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