NPTEL DATA MINING WEEK 1 ANSWERS

 

Week 1 : Assignment 1

Due date: 2023-02-08, 23:59 IST.

Assignment not submitted

1 point

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

 a. Visualization

 b. Preprocessing

 c. Modelling

 d. Deployment

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

HTML links are an example of:

 a) Record data

 b) Ordered data

 c) Graph data

 d) None of the above

Name of a place, can be considered an attribute of type?

 a) Nominal

 b) Ordinal

 c) Interval

 d) Ratio

A store sells 10 items. Maximum possible number of candidate 3-itemsets is:

 a) 120

 b) 6

 c) 15

 d) 56

1 point

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:

1 point

Support of rule {4,5} ‐> {1}

 a) 1

 b) 0.5

 c) 0.25

 d) 0

1 point

Confidence of rule {4,5} -> {1} is:

 a) 1

 b) 0.5

 c) 0.25

 d) 0.75

1 point

Support of {1} -> {2,5} is:

 a) 2/3

 b) 2/2

 c) 1/4

 d) 3/4

1 point

Confidence of {1} -> {2,5}

 a) 2/3

 b) 1

 c) 0

 d) 0.5

ANSWERS

1. D

2. A

3. C

4. A

5. A

6. B

7. B

8. A

9. A

10. B