Knowledge check

Quiz

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Knowledge check

Evaluate your understanding of this unit by completing the knowledge check below.

Question 1 of 3

Which statement best describes feature engineering?

• A. Choosing a model architecture without changing the data
• B. Transforming raw data into features that better support learning
• C. Removing all categorical variables from a dataset
• D. Replacing training data with synthetic labels

Correct Answer: B

Feedback: Feature engineering improves how the data represents the underlying problem.

Which variable type has a meaningful order but not necessarily equal spacing between values?

• A. Continuous
• B. Categorical
• C. Ordinal
• D. Binary target

Correct Answer: C

Feedback: Ordinal variables preserve ranking information.

What is one common risk of keeping too many irrelevant or redundant features?

• A. Overfitting and lower interpretability
• B. Guaranteed fairness improvement
• C. Automatic feature independence
• D. Elimination of all noise in the dataset

Correct Answer: A

Feedback: Too many weak features can increase complexity and reduce model reliability.