Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 4th Sem (Fourth Semester) Regulation-R17 2020 November 844AD Data Warehousing And Datamining Previous Question Paper
S OCT 2020
R17
Code No: 844AD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
MCA IV Semester Examinations, October/ November - 2020
DATA WAREHOUSING AND DATAMINING
Time: 2 Hours
Max.Marks:75
Answer any five questions
All questions carry equal marks
----
1.
Define data mining. Explain the steps in applying data mining to any database or data
warehouse and the significance of data mining primitives.
[15]
2.a)
What is the use of principal component analysis in data preprocessing?
b)
How to handle missing values in data mining process?
[7+8]
3.a) With the help of a neat sketch describe the three-tier architecture of data warehouse.
b)
Differentiate between dependent and independent data marts.
[7+8]
used
4.
Why are data models insufficient for data warehouse? Explain snowflake schema and
fact constellation schema for data warehouse.
[15]
5.
Find strong association rules from the following transactional data using Apriori
algorithm. Let support=30%, confidence=40%
[15]
TID
List of Items
T1
Soap, shampoo, body lotion, toothpaste
T2
Mug, bucket, soap, scrub
T3
Dettol liquid, bucket, shower caps, soap
T4
Tooth brush, foot scrapper, shower caps
T5
Harpic, Dettol liquid, shower gel, shower caps
T6
Soap, body wash, toothpaste
6.a)
What is the role of information gain in decision tree induction?
b)
Why is k-nearest neighbor classifier known as lazy learner?
[7+8]
7.
What is an outlier? What are the applications of outlier analysis? Demonstrate deviation
based approach for outlier detection.
[15]
8.
What is the objective of Page Ranking algorithm? Explain it as web structure mining
algorithm.
[15]
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This post was last modified on 17 March 2023