Avatto > UGC NET Management > PRACTICE QUESTIONS > International Business , Data Mining , DataWarehousing, Artificial Intelligence > Database > Data Mining

Database MCQ - Data Mining

81 If g(z) is the sigmoid function, then its derivative with respect to z may be written in term of g(z) as

82 In the linearly non-separable case, what effect does the C parameter have on the SVM mode.

83 Suppose that we use a RBF kernel with appropriate parameters to perform classification on a particular two class data set where the data is not linearly separable. In this scenario
1. the decision boundary in the transformed feature space is non-linear
2. the decision boundary in the transformed feature space is linear
3. the decision boundary in the original feature space is linear
4. the decision boundary in the original feature space is non-linear

84 Which of the following statements is/are true about kernel is SVM?
1. Kernel function map low dimensional data to high dimensional space
2. It's a similarity function

85 You are given reviews of few movies marked as positive, negative or neutral. Classifying reviews of a new movie is an example of

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Question:

Hidden knowledge referred to

A. A set of databases from different vendors, possibly using different database paradigms
B. An approach to a problem that is not guaranteed to work but performs well in most cases
C. Information that is hidden in a database and that cannot be recovered by a simple SQL query.
D. None of these

Correct answer: C

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