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Mr. Dubey • 100.69K Points
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Q. 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
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