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  • Social Networks8
    • Social Networks | Week 1
    • Social Networks | Week 2
    • Social Networks | Week 3
    • Social Networks | Week 4
    • Social Networks | Week 5
    • Social Networks | Week 6
    • Social Networks | Week 7
    • Social Networks | Week 8
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Social Networks | Week 5

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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.

image 60

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?

image 61

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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These are Nptel Social Networks Week 5 Assignment 5 Answers
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