This set of MCQ(multiple choice questions) focuses on the Social Networks NPTEL Week 4 Assignment Solutions.
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Week 0: Assignment answers
Week 1:Â Introduction
Week 2: Handling Real-world Network Datasets
Week 3: Strength of Weak Ties
Week 4: Strong and Weak Relationships (Continued) & HomophilyÂ
Week 5:Â Homophily Continued and +Ve / -Ve Relationships
Week 6: Link AnalysisÂ
Week 7:Â Cascading Behaviour in Networks
Week 8:Â Link Analysis (Continued)
Week 9:Â Power Laws and Rich-Get-Richer Phenomena
Week 10:Â Power law (contd..) and Epidemics
Week 11: Small World Phenomenon
Week 12: Pseudocore (How to go viral on web)
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Social Networks NPTEL 2022 Week 4 Assignment Solutions
Q1. If two people in a social network have a friend in common, then there is an increased likelihood that they will become friends themselves at some point in the future.
The above principle is referred as
a) Triadic closure
b) Foci closure
c) Membership closure
d) None of the above
Answer: a)
Q2. Two friends Simran and Soujanya like different set of food items. The set of food items Simran and Soujanya like is denoted by Si and So, respectively. Si has 17 elements whereas So has 21 elements and there are 12 items which are liked by both Simran and Soujanya (Si∩So = 12). What is the similarity measure of Simran and Soujanya, with respect to food items.
a) 12/17
b) 12/21
c) 6/19
d) 6/13
Answer: d)
Q3. Among the given two networks below, which network shows the better evidence of Homophily? (Nodes are divided into two types-represented by different colors)
a) Network A
b) Network B
c) Both exhibit equally
d) Can’t say
Answer: b)
Q4. Which phenomenon best describes the network evolution in Figure 2?
a) Homophily
b) Triadic Closure
c) Foci closure
d) Membership closure
Answer: c)
Q5. Dynamics of friendships formation and behaviour of people in a network is
a) Impacted by neither – selection and social influence.
b) Impacted by both, selection as well as social influence.
c) Impacted by selection but not social influence.
d) Impacted by social influence but not selection.
Answer: b)
Q6. Consider figures A, B and C in Figure 3 and choose the right kind of closure they represent (Please note that the solid line represents the existing friendship and the dotted line represents the new friendship.):
a) A: Triadic closure, B: Membership closure, C: Focal closure
b) A: Membership closure, B: Triadic closure, C: Focal closure
c) A: Focal closure, B: Triadic closure, C: Membership closure
d) A: Focal closure, B: Membership closure, C: Triadic closure
Answer: d)
Q7. Homophily refers to the friendship between people
a) who have a common friend
b) who have same ethnicity
c) who are similar to each other
d) who are dissimilar to each other
Answer: c)
Q8. Suppose Monica and Chandler have kk common friends. Given that each common friend gives Monica and Chandler an independent probability pp of forming a link, what is the probability that there will exist a link between Monica and Chandler?
a) pk
b) 1−(1−p)×k
c) 1−(1−p)k
d) pk
Answer: c)
Q9. Let G be a complete graph with n nodes. The total number of triangles possible in G is:
a) n3
b) n(n−1)(n−2)/6
c) 3n
d) None of the above
Answer: b)
Q10. What will the output of the following two variables respectively (written in Python3):
A = [1, 2, 3, 4] + [3, 4, 5, 6]
S = [1, 2, 3, 4] – [3, 4, 5, 6]
a) [1, 2, 3, 4, 5, 6], [1, 2, 5, 6]
b) [4, 6, 8, 10], [-2, -2, -2, -2]
c) 28, -8
d) [1, 2, 3, 4, 3, 4, 5, 6], TypeError:unsupported operand type
Answer: d)
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