قديم منذ /06-03-2018, 06:29 PM   #1

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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







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