What are Cost Functions MCQ | Optimization for AI Multiple Choice Questions

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What is a cost function in machine learning?

A. Measures model error

B. Measures model accuracy

C. Measures data size

D. Measures training time

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Mean Squared Error (MSE) is commonly used for:

A. Regression

B. Classification

C. Dimensionality reduction

D. Clustering

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What does cross-entropy loss measure?

A. Difference between probability distributions

B. Distance between points

C. Angular similarity

D. Number of misclassifications

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A cost function should be:

A. Both A and B

B. Differentiable

C. Convex

D. Neither

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Minimizing the cost function aims to:

A. Improve model performance

B. Increase overfitting

C. Increase loss

D. Decrease training accuracy

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