Q374
The most popularly used dimensionality reduction algorithm is Principal Component Analysis (PCA). Which of the following is/are true about PCA?1. PCA is an unsupervised method2. It searches for the directions that data have the largest variance3. Maximum number of principal components <= number of features4. All principal components are orthogonal to each other
A.
1 & 2
B.
2 & 3
C.
3 & 4
D.
all of the above
AnswerAnswer: Option D
Solution
Answer: Option D
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