Social Networks | Week 4
Session: JULY-DEC 2023
Course Name: Social Networks
Course Link: Click Here
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q1. Two people meet at a Health Club and then became friends with each other this represents
Triadic Closure
Membership closure
Focal closure
selection closure
Answer: Focal closure
Q2. Similarity measure can be defined as
Total number of work done by number of work in common
Number of work they do in common by Total Number of work done by both
Total number of friends by number of friends in common
Number of friends in common by Total Number of friends
Answer: Number of work they do in common by Total Number of work done by both
Q3. Social affiliation network is
Complete and bipartite
Complete and not bipartite
Bipartite and not Complete
Neither complete nor Bipartite
Answer: Bipartite and not Complete
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q4. In general, when we calculate the value for homophily it represents value between 0 to 1, what value will we get if it shows heterogeneity?
0
1
< 1
> 1
Answer: < 1
Q5. It is the tendency in which people make friends with similar interests i.e people select other people having similar habits or interests.
Homophily
Heterogeneity
Social Influence
Selection
Answer: Selection
Q6. If suppose A and B have 10 friends in common, and there is scenario that each common friend gives A and B an independent probability of 0.08 of forming a link. What is the probability that there exist a link between A and B?
1 − (0.92)^10
1 − (0.08)^10
0.9210
0.0810
Answer: 1 − (0.92)^10
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q7. Given a complete graph with 10 vertices the total number of possible triangle for the given graph will be
10000
30
300
120
Answer: 120
Q8. Which situation doesn’t occur when homophily in a network of 2 Classes is greater than 0.5?
Across edges are low in proportion
People tend to make friends within their group
The probability of selecting across edge is low
People make friends outside the group
Answer: People make friends outside the group
Q9. Which phenomenon is represented in region A of the graph in Figure 7 below?
Social Influence
Foci closure
Membership closure
Selection
Answer: Selection
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q10. Which phenomenon is represented in region B of the graph in Figure 7 below?
Social Influence
Foci closure
Membership closure
Selection
Answer: Social Influence
These are Nptel Social Networks Week 4 Assignment 4 Answers
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Session: JAN-APR 2023
Course Name: Social Networks
Course Link: Click Here
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q1. Identify the type of Homophily in the following Linked inn recommendation:
”People with similar interests are following —-”
a. Selection
b. Social Influence
c. Membership closure
d. Foci Closure
Answer: a. Selection
Q2. Identify the network mechanism in play for the following transformation.
a. Triadic closure
b. Focal Closure
c. Membership closure
d. Neighborhood overlap
Answer: c. Membership closure
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q3. Two friends Raj and Nila have taken different courses according to their interests. Raj has completed 12 courses and Nila has completed 16 courses in all. There are 7 courses that Raj and Nila have taken up in common. What is the similarity measure for Raj and Nila?
a. 1/3
b. 7/28
c. 3
d. 28/7
Answer: a. 1/3
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q4. Suppose Manisha and Simran have a common friend with an independent probability p What is the probability that they donot have k common friends?
a. p×k
b. pk
c. (1−p)k
d. (1−(1−p))k
Answer: c. (1−p)k
Q5. What are the factors that influence the dynamics of friendships formation and behaviour of people in a network?
a. Social Influence
b. Selection
c. Both Social Influence and Selection
d. Neither Social Influence nor Selection
Answer: c. Both Social Influence and Selection
Q6. In the fatman evolutionary model, what is the role of social foci?
a. Selection
b. Social Influence
c. Both Social Influence and Selection
d. Neither Social Influence nor Selection
Answer: b. Social Influence
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q7. Compute Homophily for the given network.
a. 1
b. 3/4
c. 1/2
d. 1/4
Answer: c. 1/2
Q8. What is the relationship that exists between the probability of any two persons(A and B) being friends with respect to the number of their common friends?
a. inverse
b. linear
c. polynomial
d. exponential
Answer: b. linear
These are Nptel Social Networks Week 4 Assignment 4 Answers
Q9. A network having inter-community edge density and intra-community edge sparsity will definitely exhibit
a. Triadic closure
b. Selection
c. Homophily
d. Heterophily
Answer: d. Heterophily
Q10. Assume there are 20 participants who have just enrolled for a workshop. Which of the following closure happen in this current state?
a. Triadic closure
b. Membership closure
c. Focal closure
d. None
Answer: c. Focal closure
These are Nptel Social Networks Week 4 Assignment 4 Answers
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