# N. B.: WBUT compiled two separate sets of papers for IT and CSE branches for the same subject.
CS/B.TECH/IT (New)/SEM-7/IT-704C/2013-14
2013
DATA WAREHOUSING AND DATA MINING
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
(Multiple Choice Type Question)
1. Choose the correct alternatives for the following: 10 x 1 = 10
i) A data warehouse is said to contain a ‘time-varying’ collection of data because
a) its contents vary automatically with time
b) its life-span is very limited
c) it contains historical data
d) its content has explicit time-stamp.
ii) A data warehouse is said to contain a ‘subject-oriented’ collection of data because
a) its contents have a common theme
b) it is built for a specific application
c) it cannot support multiple subjects
d) it is generalization of ‘object-oriented’.
iii) A data warehouse is built as a separate repository of data, different from the operational data of an enterprise because
a) it is necessary to keep the operational data free of any warehouse operation
b) a data warehouse cannot afford to allow corrupted data within it
c) a data warehouse contains summarized data whereas the operational database contains transactional data
d) it is just needed.