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Explain decision trees and tree ensembles
OneMain Financial
Dec 1, 2025, 12:00 AM
Data Scientist
Technical Screen
Machine Learning
0
0
Prompt
Explain how a
decision tree
works for classification or regression.
How does the tree choose a split (objective functions for classification vs regression)?
Name key
hyperparameters
and how they affect bias/variance.
Pick a different ML algorithm that uses decision trees (e.g., Random Forest, Gradient Boosted Trees) and explain how it works and when you would choose it over a single tree.