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 CS614 QUIZ NO 2 FALL 2010 31ST DECEMBER 2010

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CS614 QUIZ NO 2 FALL 2010 31ST DECEMBER 2010 Empty
PostSubject: CS614 QUIZ NO 2 FALL 2010 31ST DECEMBER 2010   CS614 QUIZ NO 2 FALL 2010 31ST DECEMBER 2010 Icon_minitimeFri Dec 31, 2010 7:47 pm

quiz no 2 of cs614

Question # 1 of 10 ( Start time: 10:29:52 PM ) Total Marks: 1
Data mining uses _________ algorithms to discover patterns and regularities in data.
Select correct option:
Mathematical
Computational
Statistical
None of these

Question # 2 of 10 ( Start time: 10:31:13 PM ) Total Marks: 1
The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
Select correct option:
Indexing
Partitioning
Joining
None of these

Question # 3 of 10 ( Start time: 10:32:34 PM ) Total Marks: 1
An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
Select correct option:
OLTP
OLAP
DSS
Inverted Index

Question # 4 of 10 ( Start time: 10:33:23 PM ) Total Marks: 1
If every key in the data file is represented in the index file then index is
Select correct option:
Dense Index
Sparse Index
Inverted Index
None of these

Question # 5 of 10 ( Start time: 10:34:47 PM ) Total Marks: 1
There are many variants of the traditional nested-loop join. If the index is built as part of the query plan and subsequently dropped, it is called
Select correct option:
Naive nested-loop join
Index nested-loop join
Temporary index nested-loop join
None of these

Question # 6 of 10 ( Start time: 10:36:08 PM ) Total Marks: 1
Data mining evolve as a mechanism to cater the limitations of ________ systems to deal massive data sets with high dimensionality, new data types, multiple heterogeneous data resources etc.
Select correct option:
OLTP
OLAP
DSS
DWH

Question # 7 of 10 ( Start time: 10:37:30 PM ) Total Marks: 1
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
Select correct option:
One
Two
Linear
Quadratic

Question # 8 of 10 ( Start time: 10:38:29 PM ) Total Marks: 1
Data mining derives its name from the similarities between searching for valuable business information in a large database, for example, finding linked products in gigabytes of store scanner data, and mining a mountain for a _________ of valuable ore.
Select correct option:
Furrow
Streak
Trough
Vein

Question # 9 of 10 ( Start time: 10:39:49 PM ) Total Marks: 1
If ‘M’ rows from table-A match the conditions in the query then table-B is accessed ‘M’ times. Suppose table-B has an index on the join column. If ‘a’ I/Os are required to read the data block for each scan plus ‘b’ I/Os for each data block then the total cost of accessing table-B is _____________ logical I/Os approximately.
Select correct option:
(a + b)M
(a - b)M
(a + b + M)
(a * b * M)

Question # 10 of 10 ( Start time: 10:41:16 PM ) Total Marks: 1
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
Select correct option:
Clustering
Aggregation
Segmentation
Partitioning
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