An itemset is closed if
Selected Answer:
Correcta.
none of its immediate supersets has the same support as the itemset
Answers:
Correcta.
none of its immediate supersets has the same support as the itemset
b.
it is frequent in the subset
c.
if its subset is maximal
d.
None of the above
Question 2
0.1 out of 0.1 points
Usually ________________ shows the distribution of values of a single variable and divide the values of objects into bins.
Selected Answer:
Correctb.
Histogram
Answers:
a.
Scatter plot
Correctb.
Histogram
c.
Box plot
d.
matrix plot
Question 3
0.1 out of 0.1 points
Removing duplicate records is a process called _____________.
Selected Answer:
Correctc.
data cleaning
Answers:
a.
data pruning
b.
recovery
Correctc.
data cleaning
d.
data cleansing
Question 4
0 out of 0.1 points
What is another name of 0-Dimentional cuboid?
Selected Answer:
Incorrectd.
0- Cuboid
Answers:
a.
1- Cuboid
b.
base cuboid
Correctc.
apex Cuboid
d.
0- Cuboid
Question 5
0.1 out of 0.1 points
FP-growth Algorithm uses a compressed representation of the database using
Selected Answer:
Correcta.
FP-tree (Frequent Pattern-Tree)
Answers:
Correcta.
FP-tree (Frequent Pattern-Tree)
b.
Association rule
c.
Hash tree
d.
All of the above
Question 6
0.1 out of 0.1 points
_______________ of data is one of the most powerful and appealing techniques for data exploration.
Selected Answer:
Correctc.
Visualization
Answers:
a.
OLAP
b.
Analysis
Correctc.
Visualization
d.
Exploration
Question 7
0.1 out of 0.1 points
Which of the following is not a data mining functionality?
Selected Answer:
Correctc.
Selection and interpretation
Answers:
a.
Clustering and Analysis
b.
Characterization and Discrimination
Correctc.
Selection and interpretation
d.
Classification and regression
Question 8
0.1 out of 0.1 points
The full form of KDD is ____________
Selected Answer:
Correcta.
Knowledge Discovery Database
Answers:
Correcta.
Knowledge Discovery Database
b.
Knowledge Data Definition
c.
Knowledge Database
d.
Knowledge Data House
Question 9
0.1 out of 0.1 points
Some telecommunication company wants to segment their customers into distinct groups in order to send appropriate subscription offers, this is an example of
Selected Answer:
Correctb.
Unsupervised learning
Answers:
a.
Data extraction
Correctb.
Unsupervised learning
c.
Supervised learning
d.
Serration
Question 10
0 out of 0.1 points
The important aspect of the data warehouse environment is that data found within the datawarehouse is ___________.
Selected Answer:
Incorrectb.
time-variant
Answers:
a.
subject-oriented
b.
time-variant
c.
integrated
Correctd.
All of the above
Question 11
0.1 out of 0.1 points
The following technology is not well-suited for data mining:
Selected Answer:
Correctb.
Technology limited to specific data types such as numeric data types
Answers:
a.
Data visualization
Correctb.
Technology limited to specific data types such as numeric data types
c.
Parallel architecture
d.
Expert system technology
Question 12
0.1 out of 0.1 points
The data is stored, retrieved & updated in ____________.
Selected Answer:
Correcta.
OLTP
Answers:
Correcta.
OLTP
b.
OLAP
c.
SMTP
d.
FTP
Question 13
0.1 out of 0.1 points
Which of the following features usually applies to data in a data warehouse?
Selected Answer:
Correcta.
Data are rarely deleted
Answers:
Correcta.
Data are rarely deleted
b.
Data are often deleted
c.
Relatively few records are processed by applications
d.
Most applications consist of transactions
Question 14
0 out of 0.1 points
____________ is selecting a group of cells from the entire multidimensional array by specifying a specific value for one or more dimensions
Selected Answer:
Incorrectc.
Dicing
Answers:
a.
Roll-up
Correctb.
Slicing
c.
Dicing
d.
Drill-down
Question 15
0.1 out of 0.1 points
The star schema is composed of __________ fact table.
Selected Answer:
Correctd.
one
Answers:
a.
three
b.
two
c.
four
Correctd.
one