This set of MCQ(multiple choice questions) focuses on the Social Networks NPTEL Week 5 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 5 Assignment Solutions
Q1. Let − denote friendship and + denotes enmity relationship in a social network. Which of the following are not stable triangular relationship structures?
I. +, +, +
II. +, +, −
III. +, −, −
IV. −, −, −
a) I, II and III
b) II, III and IV
c) I and III
d) II and IV
Answer: c) I and III
Q2. Two of my close friends hate each other. In how many ways can the structure evolve to a stable configuration?
a) 1
b) 2
c) 3
d) It is already stable.
Answer: c) 3
Q3. A triangular network is stable if it has ________ +ve relationships.
a) Only 2
b) no
c) odd number of
d) even number of
Answer: c) odd number of
Q4. Choose the False statement out of the following:
a) Structural balance involves studying the interplay of positive and negative relationships among the nodes over time.
b) Structural balance is a theory that offers ways of equating the number of positive and negative edges in a network so that it becomes ‘balanced’.
c) Structural balance illustrates a nice connection between local and global network properties.
d) Structural balance is to understand the tension between the two forces, i.e. friendship and antagonism.
Answer: b) Structural balance is a theory that offers ways of equating the number of positive and negative edges in a network so that it becomes ‘balanced’.
Q5. Which of the following triangles follows the social belief that ‘Enemy of my enemy is my friend’?
Answer: b)
Q6. A friend’s friend tends to become a friend, and so does an enemy’s enemy. The reasons for the same are
a) Social influence and clustering respectively
b) Social influence and structural balance respectively
c) Triadic closure and structural balance respectively
d) Triadic closure and clustering respectively
Answer: c) Triadic closure and structural balance respectively
Q7. Count the number of unstable triangles in the graphs shown in figure 1, where solid edges indicate positive ties and dotted edges indicate negative ties.
a) 8,5,6
b) 8,4,6
c) 7,3,7
d) 7,3,6
Answer: d) 7,3,6
Q8. Which of the following structures of graphs is/are balanced?
a) Both (a) and (c)
b) Only (a)
c) Only (b)
d) Both (b) and (d)
Answer: b) Only (a)
Q9. Can we have a complete signed graph on 4 nodes (K4) and 5 nodes (K5) respectively, each having exactly one unstable triangle?
a) K4 – Yes K5 – Yes
b) K4 – Yes K5 – No
c) K4 – No K5 – Yes
d) K4 – No K5 – No
Answer: d) K4 – No K5 – No
Q10. In a graph having n nodes, how many possible triangles can be present?
a) n3
b) 3n
c) n(n−1)(n−2)/6
d) None of the above
Answer: c) n(n−1)(n−2)/6
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