[Week 1-12] NPTEL Data Mining Assignment Answers 2024

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NPTEL Data Mining Week 1 Assignment Answers 2024

1. The earliest step in the data mining process is usually?

a) Visualization
b) Preprocessing
c) Modelling
d) Deployment

Answer :- 

2. Which of the following is an example of continuous attribute?:

a) Height of a person
b) Name of a person
c) Gender of a person
d) None of the above

Answer :- 

3. Friendship structure of users in a social networking site can be considered as an example of:

a) Record data
b) Ordered data
c) Graph data
d) None of the above

Answer :- 

4. Name of a person, can be considered as an attribute of type?

a) Nominal
b) Ordinal
c) Interval
d) Ratio

Answer :- 

5. A store sells 15 items. Maximum possible number of candidate 2-itemsets is:

a) 120
b) 105
c) 150
d) 2

Answer :- 

6. 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

Answer Q7-Q10 based on the following table:

Customer IDTransaction IDItems Bought
Answer :- 

7. Taking transaction ID as a market basket, support for each itemset {e}, {b,d}, and {b,d,e} is:

a) 0.8, 0.2, 0.2
b) 0.3, 0.3, 0.4
c) 0.25, 0.25, 0.5
d) 1,0,0

Answer :- 

8. Based on the results in (7), confidence of association rules {b,d}->{e} and {e}->{b,d} are:

a) 0.5, 0.5
b) 1, 0.25
c) 0.25, 1
d) 0.75, 0.25

Answer :- 

9. Repeat (7) by taking customer ID as market basket. An item is treated as 1 if it appears in at least one transaction done by the customer, 0 otherwise. Support of itemsets {e}, {b,d}, {b,d,e} are:

a) 0.3, 0.5, 0.2
b) 0.8, 1, 0.2
c) 1, 0.2, 0.8
d) 0.8, 1, 0.8

Answer :- 

10. Based on the results in (9), confidence of association rules {b,d}->{e} and {e}->{b,d} are:

a) 0.8, 1
b) 1, 0.8
c) 0.25, 1
d) 1, 0.25

Answer :- 

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