AI-900Domain 2: Describe Fundamental Principles of Machine Learning on AzureMachine Learning PrincipleseasySingle choice
Match the task to the ML type: predicting a house's sale price from features; grouping customers by purchase behavior without predefined categories. (Select the correct pair)
A.Classification, then clustering
Price is continuous, not a category — first one is regression.
B.Regression, then clustering
Continuous → regression; unlabeled grouping → clustering. Correct.
C.Clustering, then regression
Fully reversed.
D.Regression, then classification
Behavior grouping without labels is clustering, not classification.
Why this answer
Regression predicts continuous numeric values (price). Classification predicts categories (spam/not-spam). Clustering groups unlabeled data by similarity — no predefined categories. The three-model-type split is THE core AI-900 ML question.
Correct answer: B · Last reviewed 2026-02-14
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