Social Networks | Week 5
Course Name: Social Networks
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These are Nptel Social Networks Week 5 Assignment 5 Answers
Q1. Which of the following is an invalid value for the two dimensional Schelling model grid?
a. 1
b. 2
c. 4
d. 9
Answer: d. 9
Q2. Given a triangular network with two positive relationships, When is the network stable?
a. Never
b. Sometimes
c. Always
d. cannot be inferred
Answer: b. Sometimes
These are Nptel Social Networks Week 5 Assignment 5 Answers
Q3. Given the two dimensional grid in Figure 1, comment on the stability of the node in the center for A and B, given threshold t=2.
a. unstable, unstable
b. unstable, stable
c. stable, unstable
d. stable, stable
Answer: a. unstable, unstable
These are Nptel Social Networks Week 5 Assignment 5 Answers
Q4. For a graph with five nodes, what is the maximum number of possible triangles in it?
a. 10
b. 20
c. 30
d. 40
Answer: a. 10
Q5. Which of the following triangles are unstable?
a. a and b
b. b and c
c. c and d
d. a and d
Answer: b. b and c
Q6. Can we have a complete signed graph on 4 nodes (K4) and 5 nodes (K5) respectively, each having exactly one unstable triangle respectively?
a. No, No
b. No, Yes
c. Yes, No
d. Yes, Yes
Answer: c. Yes, No
These are Nptel Social Networks Week 5 Assignment 5 Answers
Q7. Select all that is True for a structurally balanced network according to the Balance theorem?
a. It can be a network with all positive relationships
b. It can be a network of two clusters with all positive relationships across and all negative relationships within cluster
c. It can be a network of two clusters with all positive relationships within and all negative relationships across cluster
d. It can be a network with all negative relationships
Answer: a, c
Q8. Given an unstable triangle with edges (+, +, −), this tends to become stable by transforming to a stable state. Which one of the following is an invalid option for such a stable state?
a. (+, +, +)
b. (+, −, −)
c. (−, −, +)
d. (−, −, −)
Answer: a. (+, +, +)
These are Nptel Social Networks Week 5 Assignment 5 Answers
Q9. A friend’s friend tends to become a friend, and so does an enemy’s enemy. Pick out the reason(s).
a. Triadic closure
b. Structural balance
c. Social influence
d. Selection
Answer: a, b
Q10. When is a signed triangle said to be unstable?
a. zero positive edge
b. one positive edge
c. two positive edges
d. all positive edges
Answer: c, d
These are Nptel Social Networks Week 5 Assignment 5 Answers
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These are Nptel Social Networks Week 5 Assignment 5 Answers
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