Machine Learning Practice · End Term · 13 Apr 2025 · January 2025 term · Set QDD3

Question 2: Consider the following code snippet: If the shape of X is…

Question 2

+1 markOne correct option

Consider the following code snippet:

python

1from sklearn.datasets import fetch_california_housing
2from sklearn.decomposition import PCA
3from sklearn.preprocessing import StandardScaler, PolynomialFeatures
4from sklearn.pipeline import Pipeline, FeatureUnion
5
6
7data = fetch_california_housing()
8X = data.data
9
10polynomial_transform = PolynomialFeatures(degree=2, include_bias=False)
11pca_transform = PCA(n_components=5)
12scaler = StandardScaler()
13
14
15combined_features = FeatureUnion([  ('poly', polynomial_transform),
16    ('pca', pca_transform)])
17
18
19pipeline = Pipeline([ ('features', combined_features),
20    ('scaler', scaler)])
21
22X_transformed = pipeline.fit_transform(X)
23
24print(X_transformed.shape)

If the shape of X is $(20640, 8)$ , what will be the shape of X_transformed?

A
(20640, 8)
B
(20640, 5)
C
(20640, 44)
D
(20640, 49)

Show answer

Correct answer

D
(20640, 49)

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Question 2 of 30 in the IIT Madras BS Machine Learning Practice (MLP) End Term paper sat on 13 Apr 2025, in the January 2025 term (IIT M DIPLOMA AN EXAM QDD3 13 Apr 2025). It carries 1 mark.

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