NPTEL Data Mining Week 1 Assignment Answers 2025
1. 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?
A. voluminous
B. heterogeneous
C. actionable
D. noisy
Answer :- c
2. Which of the following is usually the last step in the data mining process?
A. Visualization
B. Preprocessing
C. Modeling
D. Deployment
Answer :- d
3. Name of a movie, can be considered as an attribute of type?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
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4. User rating given to a movie in a scale 1-10, can be considered as an attribute of type?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Answer :-
5. Which of the following operations cannot be performed on interval attributes?
A. Distinctness
B. Order
C. Addition
D. Multiplication
Answer :-
6. Which of the following operations can be performed on ratio attributes?
A. Addition
B. Multiplication
C. Both of the above
D. None of the above
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7. Sales database of items in a supermarket can be considered as an example of:
A. Record data
B. Tree data
C. Graph data
D. None of the above
Answer :-
8. Rows of a data matrix storing record data usually represents?
A. Metadata
B. Objects
C. Attributes
D. Aggregates
Answer :-
9. Which of the following is an example of continuous attribute?
A. Weight of a person
B. Shoe size of a person
C. Gender of a person
D. None of the above
Answer :-
10. If a record data matrix has reduced number of columns after a transformation, the transformation has performed:
A. Data sampling
B. Dimensionality reduction
C. Noise cleaning
D. Discretization
Answer :-
11. If a record data matrix has reduced number of rows after a transformation, the transformation has performed:
A. Data sampling
B. Dimensionality reduction
C. Noise cleaning
D. Discretization
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