Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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9) In supervised learning, the performance of the classifier on the training set is NOT a good indicator of performance on an independent test set. 10) a) True b) False happens when a learning algorithm does not generalize well over unseen data. a) Pruning b) Over-fitting c) Randomization d) Stratification 11) The k-means algorithm is not sensitive to outliers because an instance with an extremely large value may not substantially distort the distribution of the data a) True b) False 12) Which of the following regarding medoid is NOT true? a) A medoid is the most centrally located object in a cluster b) A medoid is constructed by taking the mean value of the objects in a cluster c) A medoid in a cluster is a real instance 13) In recommender systems, usually, implicit feedback comprises a feedback comprises a matrix. a) dense, sparse b) sparse, dense matrix, while explicit 14) If you are building a recommender system for netflix.com which recommends products leveraging only explicit ratings, then which algorithm would you use? a) Stochastic Gradient Descent b) Alternating Least Squares 15) Which of the following is a limitation of deep learning (DL)? a) DL is not capable of modeling high dimensional and highly non-linear functions b) DL requires sophisticated feature engineering by experts c) DL is generally interpretable d) DL is extremely data intensive
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Transcribed Image Text:9) In supervised learning, the performance of the classifier on the training set is NOT a good indicator of performance on an independent test set. 10) a) True b) False happens when a learning algorithm does not generalize well over unseen data. a) Pruning b) Over-fitting c) Randomization d) Stratification 11) The k-means algorithm is not sensitive to outliers because an instance with an extremely large value may not substantially distort the distribution of the data a) True b) False 12) Which of the following regarding medoid is NOT true? a) A medoid is the most centrally located object in a cluster b) A medoid is constructed by taking the mean value of the objects in a cluster c) A medoid in a cluster is a real instance 13) In recommender systems, usually, implicit feedback comprises a feedback comprises a matrix. a) dense, sparse b) sparse, dense matrix, while explicit 14) If you are building a recommender system for netflix.com which recommends products leveraging only explicit ratings, then which algorithm would you use? a) Stochastic Gradient Descent b) Alternating Least Squares 15) Which of the following is a limitation of deep learning (DL)? a) DL is not capable of modeling high dimensional and highly non-linear functions b) DL requires sophisticated feature engineering by experts c) DL is generally interpretable d) DL is extremely data intensive
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