Database MCQ - Data Mining

46 Prediction is

A
The result of the application of a theory or a rule in a specific case
B
One of several possible enters within a database table that is chosen by the designer as the primary means of accessing the data in the table.
C
Discipline in statistics that studies ways to find the most interesting projections of multi-dimensional spaces.
D
None of these

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Correct AnswerOption A

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47 Query tools are

A
A reference to the speed of an algorithm, which is quadratically dependent on the size of the data
B
Attributes of a database table that can take only numerical values
C
Tools designed to query a database
D
None of these

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Correct AnswerOption C

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48 Operational database is

A
A measure of the desired maximal complexity of data mining algorithms
B
A database containing volatile data used for the daily operation of an organization
C
Relational database management system
D
None of these

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Correct AnswerOption B

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49 Noise is

A
A component of a network
B
In the context of KDD and data mining, this refers to random errors in a database table.
C
One of the defining aspects of a data warehouse
D
None of these

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Correct AnswerOption B

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50 Which of the following is true for a decision tree?

A
A decision tree is an example of a linear classifier.
B
The entropy of a node typically decreases as we go down a decision tree.
C
Entropy is a measure of purity.
D
An attribute with lower mutual information should be preferred to other attributes

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Correct AnswerOption B

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