Q. Application of machine learning methods to large databases is called

  • (A) data mining.
  • (B) artificial intelligence
  • (C) big data computing
  • (D) internet of things
πŸ’¬ Discuss
βœ… Correct Answer: (A) data mining.

Q. If machine learning model output involves target variable then that model is called as

  • (A) descriptive model
  • (B) predictive model
  • (C) reinforcement learning
  • (D) all of the above
πŸ’¬ Discuss
βœ… Correct Answer: (B) predictive model

Q. In what type of learning labelled training data is used

  • (A) unsupervised learning
  • (B) supervised learning
  • (C) reinforcement learning
  • (D) active learning
πŸ’¬ Discuss
βœ… Correct Answer: (B) supervised learning

Q. In following type of feature selection method we start with empty feature set

  • (A) forward feature selection
  • (B) backword feature selection
  • (C) both a and b??
  • (D) none of the above
πŸ’¬ Discuss
βœ… Correct Answer: (A) forward feature selection

Q. In PCA the number of input dimensiona are equal to principal components

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---
πŸ’¬ Discuss
βœ… Correct Answer: (A) true

Q. PCA can be used for projecting and visualizing data in lower dimensions.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---
πŸ’¬ Discuss
βœ… Correct Answer: (A) true

Q. Which of the following is the best machine learning method?

  • (A) scalable
  • (B) accuracy
  • (C) fast
  • (D) all of the above
πŸ’¬ Discuss
βœ… Correct Answer: (D) all of the above

Q. What characterize unlabeled examples in machine learning

  • (A) there is no prior knowledge
  • (B) there is no confusing knowledge
  • (C) there is prior knowledge
  • (D) there is plenty of confusing knowledge
πŸ’¬ Discuss
βœ… Correct Answer: (D) there is plenty of confusing knowledge

Q. What does dimensionality reduction reduce?

  • (A) stochastics
  • (B) collinerity
  • (C) performance
  • (D) entropy
πŸ’¬ Discuss
βœ… Correct Answer: (B) collinerity

Q. Data used to build a data mining model.

  • (A) training data
  • (B) validation data
  • (C) test data
  • (D) hidden data
πŸ’¬ Discuss
βœ… Correct Answer: (A) training data

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