Compare bagging, boosting, random forests, and bias-variance

Q: Compare bagging, boosting, random forests, and bias-variance

This is a Machine Learning interview question from Qube for Software Engineer roles. View the full question and solution on PracHub.

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Question

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You are asked several ML theory questions:

Bagging vs. boosting
- What is the difference between bagging and boosting?
- When would you prefer one over the other?
Random forest
- What is a random forest?
- How does it relate to bagging and decision trees?
Bias–variance tradeoff
- Define bias and variance.
- How do bagging/boosting/random forests typically affect bias and variance?
- What common symptoms would you observe (e.g., underfitting/overfitting) and how would you mitigate them?

Compare bagging, boosting, random forests, and bias-variance

Solution

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