Question 1
Hierarchical
agglomerative clustering can be stopped at a certain point
if
we want to create n (n < data-points) number of clusters.
Select
one:
True
False
Feedback
The
correct answer is 'True'.
Question 2
k-means
algorithm always converges
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 3
K-means
clustering requires that we give it the number of clusters we
want
to be created.
Select
one:
True
False
Feedback
The
correct answer is 'True'.
Question 4
Nested
cluster diagram can be used to represent k-means also.
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 5
Analysis
of patterns for stock market prediction is an example of:
Select
one:
evolution
analysis
outlier
analysis
correlation
characterization
and discrimination
Feedback
The
correct answer is: evolution analysis
Question 6
Given
a single conditional FP-tree ending in a given frequent 1-itemset,
we
can find all the other frequent itemsets ending in any frequent itemset.
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 7
If
k is fixed in k-means we always get same clusters of points.
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 8
FP-growth
is fast due to the hash tree structure that is used to store
candidate
itemsets.
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 9
A
supermarket database has 2000 transactions, out of which 40 include
both
items A and B, and 16 out of these 40 also contain item C. In
total,
100 transactions contain C.
The
Lift of association rule "If A and B are purchased, then C is
purchased
in the same transaction" is:
Select
one:
2
8
4
16
Feedback
The
correct answer is: 8
Question 10
FP-growth
has an advantage over apriori algorithm that:
Select
one:
a.
FP-tree is a compact structure whereas apriori tree is complex
b.
FP-growth can find all frequent itemsets
c.
FP-growth works by just creating a binary tree structure
d.
no candidate itemsets need to be generated
Feedback
The
correct answer is: no candidate itemsets need to be generated
Question 11
Number
of groups is known apriori in:
Select
one:
a.
classification
b.
outlier
c.
clustering
d.
preprocessing
Feedback
The
correct answer is: classification
Question 12
In
association analysis, support is a symmetric measure of associations.
Select
one:
True
False
Feedback
The
correct answer is 'True'.
Question 13
If
in random sub-sampling repetition k=1, it is same as:
Select
one:
a.
stratified subsampling
b.
bootstrap
c.
k-fold cross-validation
d.
holdout
Feedback
The
correct answer is: holdout
Question 14
In
10-fold cross validation, sample data is partitioned into 10 equal
subsamples.
Of the 10 subsamples, a single subsample is retained as the
validation
data for testing the model, and the remaining 9 subsamples
are
used as training data. This is done exactly once and the result of
testing
is final. True or False?
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 15
The
table below shows marks in math (x) and marks in statistics (y).
What
is the value of the slope (m) of simple regression line ?
Select
one:
a.
0.744
b.
0.444
c.
0.644
d.
0.544
Feedback
The
correct answer is: 0.644
Question 16
The
following data is about a poll that occurred in 3 states. In state1,
50%
of voters support Party1, in state2, 60% of the voters support
Party1,
and in state3, 35% of the voters support Party1. Of the total
population
of the three states, 40% live in state1, 25% live in state2,
and
35% live in state3. Given that a voter supports Party1, what is the
probability
that he lives in state2?
Select
one:
0.62
0.32
0.52
0.42
Feedback
The
correct answer is: 0.32
Question 17
Single
link or Complete link in hierarchical clustering is used to
determine
the inter-cluster distance. The clustering algorithm always
selects
the nearest clusters to merge.
Select
one:
True
False
Feedback
The
correct answer is 'True'.
Question 18
In
classification, we evaluate the performance of a classifier on
training
data
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 19
The
following a valid FP-tree: True or False?
Select
one:
True
False
Feedback
The
correct answer is 'False'.
Question 20
Once
we get all frequent itemsets using a method such as like apriori,
we
can use the support counts to generate all strong association rules.
Select
one:
True
False
Feedback
The
correct answer is 'False'.
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