Machine Learning: MCQs Set – 15

Machine Learning: MCQs Set – 15

Q141: Computational complexity of Gradient descent is

  • (A) linear in D
  • (B) linear in N
  • (C) polynomial in D
  • (D) dependent on the number of iterations

Q142: The adjusted multiple coefficient of determination accounts for

  • (A) the number of dependent variables in the model
  • (B) the number of independent variables in the model
  • (C) unusually large predictors
  • (D) none of the above

Q143: Which of the following statements regarding the Gradient of a Continuous and Differentiable Function is false?

  • (A) is zero at a minimum
  • (B) is non-zero at a maximum
  • (C) is zero at a saddle point
  • (D) decreases as you get closer to the minimum

Q144: Which of the following is an example of a deterministic algorithm?

  • (A) PCA
  • (B) K-Means
  • (C) KNN
  • (D) None of the above

Q145: Batch Normalization is helpful because

  • (A) It normalizes (changes) all the input before sending it to the next layer
  • (B) It returns back the normalized mean and standard deviation of weights
  • (C) It is a very efficient backpropagation technique
  • (D) None of these

Q146: Which of the following are true about generative models?

  • (A) They model the joint distribution P(class = C AND sample = x)
  • (B) The perceptron is a generative model
  • (C) They can be used for classification
  • (D) Linear discriminant analysis is a generative model

Q147: Let A and B be events on the same sample space, with P (A) = 0.6 and P (B) = 0.7. Can these two events be disjoint?

  • (A) Yes
  • (B) No

Q148: After performing the Z-test, what can we conclude ____?

  • (A) Listening to music does not improve memory.
  • (B) Listening to music significantly improves memory at p
  • (C) The information is insufficient for any conclusion.
  • (D) None of the above

Q149: Assume you’re in the final round of the game show “Let’s Make a Deal,” and you have to pick between three doors – 1, 2, and 3. One of the three doors has a vehicle behind it, while the other two contain goats. Assume you select Door 1 and the host opens Door 3 to reveal a goat. Which of the following choices would you select to increase your chances of winning?

  • (A) Switch your choice
  • (B) Retain your choice
  • (C) It doesn’t matter probability of winning or losing is the same with or without revealing one door.

Q150: Assume you’re participating in a game in which we throw a fair coin several times. You’ve already lost three times when you guessed heads but got tails. Which of the following statements is correct in this situation?

  • (A) You should guess heads again since the tails has already occurred thrice and its more likely for heads to occur now
  • (B) You should say tails because guessing heads is not making you win
  • (C) You have the same probability of winning in guessing either, hence whatever you guess there is just a 50-50 chance of winning or losing
  • (D) None of these