Data Mining Quiz

Data mining is the process of finding valid, novel, useful, and _______________, patterns in large volume of data. Which of the following terms best fills the gap above?

• voluminous

• heterogeneous

• actionable

• noisy

Which of the following is usually the last step in the data mining process?

• Visualization

• Preprocessing

• Modeling

• Deployment

Name of a movie, can be considered as an attribute of type?

• Nominal

• Ordinal

• Interval

• Ratio

User rating given to a movie in a scale 1-10, can be considered as an attribute of type?

• Nominal

• Ordinal

• Interval

• Ratio

Which of the following operations cannot be performed on interval attributes?

• Distinctness

• Order

• Addition

• Multiplication

Which of the following operations can be performed on ratio attributes?

• Addition

• Multiplication

• Both of the above

• None of the above

Sales database of items in a supermarket can be considered as an example of:

• Record data

• Tree data

• Graph data

• None of the above

Rows of a data matrix storing record data usually represents?

• Metadata

• Objects

• Attributes

• Aggregates

Which of the following is an example of continuous attribute?

• Weight of a person

• Shoe size of a person

• Gender of a person

• None of the above

If a record data matrix has reduced number of columns after a transformation, the transformation has performed:

• Data sampling

• Dimensionality reduction

• Noise cleaning

• Discretization