Knowledge check

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Knowledge check

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

Question 1 of 3

Why do different data types require different feature engineering techniques?

• A. Different formats contain different structures and signals
• B. The same encoding always works best
• C. Unstructured data cannot be modelled
• D. Feature engineering only matters for text

Correct Answer: A

Feedback: Numerical, categorical, text, image and time-based data all need different preparation methods.

Which technique is commonly used to convert text into numeric features?

• A. One-hot scaling
• B. PCA tagging
• C. Random binning
• D. Vectorisation

Correct Answer: D

Feedback: Text must be converted into numeric representations before modelling.

Which type of feature engineering is especially important for forecasting problems?

• A. Only image augmentation
• B. Only one-hot encoding
• C. Time-based feature engineering
• D. Ignoring seasonality

Correct Answer: C

Feedback: Time-aware features help models capture recency, trend and seasonality.