‫بسمه تعالي‬
‫دانشكده مهندسی كامپيوتر‬
Multiple Choices
1. Summarization is a simple addition of values
along one or more data dimensions.
a) True
b) False
2. _____ is a process of taking operational data from
one or more sources and mapping it, field by field,
onto a new data structure in the data warehouse.
a) Transformation
b) Cleansing
c) Integration
d) Scrubbing
3. Which of the following fields below typically
make use of Data Mining techniques?
a) Marketing
b) Government intelligence
c) Advertising
d) All of above
4. What is meant by discrete data‫؟‬
a) One that allows Only finite set of values
b) One that allows real numbers only
c) Both a and b
d) One that allows float values only
5. _________stores data in a summarized version
a) Cube
b) Roll up
c) Both a and b
d) A mine
6. _________ is a process of taking operational data
from one or more sources and mapping it, field by
field, onto a new data structure in the data warehouse
a) Transformation
b) Cleansing
c) Integration
d) Scrubbing
7. What is the nature of Quality of data?
a) The data should be accurate
b) The data could be stored according to data
type
c) The data should be timely
d) Both a and c
8. Which algorithm is used to find correlations
among different attributes in a data set?
a) Associative algorithm
b) Association algorithm
c) Time Series algorithm
d) Series algorithm
9. Which stage of data mining involves preparation
and collection of data?
a) Validation
b) Exploration
c) Both a and b
‫نام و نام‬
:‫خانوادگی‬
‫شماره‬
:‫دانشجویی‬
d) Collection
10. Modeling is used to create a data model that helps
further define information requirements
a) True
b) False
11. What is data mining?
a) Used to find patterns by comparing large
amounts of data
b) Used to find patterns by comparing large
amounts of data mainly for statistically
inclined users
c) used for extracting and storing data which
allows easier reporting
d) Both a and b
12. Height, width comes under which type of data?
a) Finite
b) Discrete
c) Continuous
d) None of the above
Short Answer
1. If {1, 2, 3} and {2, 3, 4} are the only large 3
itemsets, identify for each one of the following
sets if it is or is not a large itemset ,or you cannot
be certain if it is a large itemset or not.
i.
ii.
iii.
iv.
v.
{1}
{1, 2}
{1, 4}
{1, 2, 3, 4}
{1, 3, 4}
2. Discuss the advantages and disadvantages of
applying sampling to reduce the number of data
objects that need to be displayed.
3. Is
simple
random
sampling
(without
replacement) a good approach to sampling? Why
or why not?