An ensemble of decision trees built on different samples or features

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Free CFA Quantitative Methods Practice Questions & Answers

1,200 exam-style Quantitative Methods questions. Pick your answer, hit Check answer, and see the worked solution — free to start, no signup.

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Question 601

A cluster that contains points with very different densities and shapes may be better handled by:

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Question 602

The main advantage of DBSCAN over K‑means is that DBSCAN:

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Question 603

Adjusted (R^2) is used instead of (R^2) because:

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Question 604

A model that fits the historical data extremely well but performs poorly on new data is likely:

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Question 605

A predicted probability from a logistic regression of 0.8 for default means:

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Question 606

Supervised learning involves:

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Question 607

Overfitting in machine learning means:

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Question 608

A common way to check for overfitting is to:

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Question 609

Penalized regression methods (like Lasso or Ridge) are used to:

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Question 610

A decision tree model:

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Question 611

A random forest is:

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Question 612

In supervised learning, a “training set” is:

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Question 613

A “test set” is used to:

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Question 614

Cross-validation is a technique to:

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Question 615

A neural network consists of:

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Question 616

Deep learning refers to neural networks with:

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Question 617

Feature selection aims to:

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Question 618

If two independent variables are uncorrelated, this means:

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Question 619

A model with too many variables may show:

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Question 620

A model with too few variables may show:

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Question 621

A model that fits the training data extremely well but fails on new data is:

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Question 622

A key difference between supervised and unsupervised learning is:

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Question 623

A model that memorizes training data but fails on new data is:

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Question 624

A validation set is used to:

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Question 625

A test set is used to:

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Question 626

Regularization methods help reduce:

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Question 627

A decision tree may overfit because:

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Question 628

A random forest reduces overfitting by:

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Question 629

Feature engineering involves:

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Question 630

ARCH behavior implies that variance is:

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Free CFA Quantitative Methods Practice Questions & Answers

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