Title: Quiz Ch 3
Course: Machine Learning Security - Winter WC > Section: Unit 3

Q: Which item is a dataset of handwritten digit images?
- MNIST
- Binary Classifier
- Sklearn
- Cross-Validation
A: MNIST

Q: Which item is a model that identifies only one digit?
- Binary Classifier
- Sklearn
- Cross-Validation
- MNIST
A: Binary Classifier

Q: What performance measure is high if there are no false positives, even if there are many false negatives?
- Precision
- Recall
- F1 Score
- Confusion matrix
A: Precision

Q: What performance measure is high if the threshold is low, so there are many false positives?
- Recall
- Precision
- F1 Score
- Confusion matrix
A: Recall

Q: What system trains 10 binary classifiers to classify ten digits?
- OvR
- OvO
- Both OvR and OvO
- Neither OvR nor OvO
A: OvR