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Machine Learning Practice · Quiz 1 · 27 Oct 2024 · September 2024 term

Question 17: Consider the following code snippet: How many components…

Question 17

+2 marksOne correct option

Consider the following code snippet:

python
from sklearn.pipeline import Pipeline
from sklearn.preprocessing import StandardScaler
from sklearn.decomposition import PCA
from sklearn.impute import SimpleImputer


pipe = Pipeline([('impute', SimpleImputer(strategy='most_frequent')),
                 ('scale', StandardScaler()),
                 ('reduce', PCA(n_components=2))])


data = np.array([[3, np.nan, 5],
                 [1, 2, np.nan],
                 [np.nan, 4, 6]])


transformed_data = pipe.fit_transform(data)

How many components does the PCA reduce the data to, after transformation?

  1. A

    2

  2. B

    3

  3. C

    1

  4. D

    None of these

Show answer

Correct answer

  • A

    2

See the whole paperTake it as a mock test

Question 17 of 22 in the IIT Madras BS Machine Learning Practice (MLP) Quiz 1 paper sat on 27 Oct 2024, in the September 2024 term (IIT M DIPLOMA AN EXAM QDD2 27 Oct 2024). It carries 2 marks.

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