Data Mining | Week 1
Data Mining Week 1 Answers
link: Data Mining Week 1 (nptel.ac.in)
1. Which of the following is usually the last step in the data mining process?
a. Visualization
b. Preprocessing
c. Modelling
d. Deployment
2. Sales database of items in a supermarket can be considered as an example of:
a) Record data
b) Ordered data
c) Graph data
d) None of the above
3. HTML links are an example of:
a) Record data
b) Ordered data
c) Graph data
d) None of the above
4. Name of a place, can be considered an attribute of type?
a) Nominal
b) Ordinal
c) Interval
d) Ratio
5. A store sells 10 items. Maximum possible number of candidate 3-itemsets is:
a) 120
b) 6
c) 15
d) 56
6. 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 Q7-Q10 based on the following table:
7. Support of rule {4,5} ‐> {1}
a) 1
b) 0.5
c) 0.25
d) 0
8. Confidence of rule {4,5} -> {1} is:
a) 1
b) 0.5
c) 0.25
d) 0.75
9. Support of {1} -> {2,5} is:
a) 2/3
b) 2/2
c) 1/4
d) 3/4
10. Confidence of {1} -> {2,5}
a) 2/3
b) 1
c) 0
d) 0.5
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