Machine Learning Intermediate Quiz 4
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Intermediate Quiz 4
1. Which is a common activation function in neural networks?
ReLU
PCA
Bagging
2. What is the main use of a validation set?
To tune model hyperparameters
To train the model
To test the final model
3. What does the bias-variance tradeoff describe?
The balance between model simplicity and complexity
The difference between training and test data
The number of features in a model
4. Which of these is a method for feature extraction?
Principal Component Analysis (PCA)
Grid Search
Dropout
5. Which method is used to evaluate a model’s ability to generalize?
Cross-validation
Feature scaling
Imputation
6. What is a confusion matrix cell "True Negative"?
Model predicted negative and it was actually negative
Model predicted positive and it was actually negative
Model predicted negative and it was actually positive
7. Which technique is used to reduce multicollinearity?
Removing correlated features
Adding more data
Increasing learning rate
8. What is an epoch in neural network training?
One full pass through the training data
A single prediction
A hyperparameter
9. Which of these is a tree-based ensemble method?
Gradient Boosting
K-Means
Logistic Regression
10. What is the purpose of one-hot encoding?
Convert categorical variables into numeric format
Reduce the number of samples
Increase model complexity
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