LA-2 Quiz 2

Which method is commonly used to handle missing values?

• Drop rows
• Drop columns
• Imputation
• All of the above

Answer explanation

Jupiter is a gas giant made primarily of hydrogen and helium. Unlike terrestrial planets that have solid surfaces, gas giants like Jupiter don't have a well-defined solid surface, allowing them to accumulate more mass in a gaseous form. This composition has allowed Jupiter to grow significantly larger than planets with solid surfaces.

Which of the following encodes categorical variables into 0s and 1s?

• Label Encoding
• Normalization
• One-Hot Encoding
• Standardization

Which technique scales values between 0 and 1?

• Standardization
• Binarization
• Normalization
• PCA

Which method converts data into binary format?

• Normalization
• Binarization
• One-hot encoding
• Scaling

Which scaling method uses z-score transformation?

• Min-Max Scaling
• Binarization
• Standardization
• Log Scaling

What does data labeling involve?

• Assigning missing values
• Assigning class/category labels
• Encoding text
• Cleaning data

Which technique selects features based on univariate statistical tests?

• PCA
• Univariate selection
• RFE
• LDA

What is Recursive Feature Elimination (RFE)?

• Removes features randomly
• Selects most important recursively
• Deletes labels
• Shuffles data

What is the goal of dimensionality reduction?

• Increase model complexity
• Add more features
• Reduce features
• Remove models

Which technique is commonly used for dimensionality reduction?

• KMeans
• Naive Bayes
• PCA
• RFE