- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 6. Machine Learning
- Subject 3. Supervised Machine Learning Algorithms
CFA Practice Question
Which statement is TRUE?
A. KNN can only be used for binary classification but not for multi-class classification.
B. In a CART model, one feature can appear only once to minimize classification error.
C. Ensemble learning typically produces more accurate and more stable predictions than the best single model.
Explanation: A is false. KNN can be used directly for multi-class classification.
B is false. The same feature can appear several times in combination with other features, and some features may be relevant only if other conditions have been met.
C is true. A single model will have a certain error rate and will make noisy predictions. Ensemble learning typically produces more accurate and more stable predictions than the best single model.
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