CMN 150V MIDTERM EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
Session 3 - Answers
In the social sciences, the term "social networks" refers to social media, like Facebook, Twitter,
Snapchat and Instagram. - Answers False
Prof. Fowler implies that the people you are not directly connected with (distant friends of friends)
are there, but that they do not really matter if we want to understand your behavior or that of society
at large. - Answers False
Prof. Fowler and his colleague have found that the health of a friend's friend's friend can tell me
something about your health. - Answers True
Which of the following saying was used to refer to the concept of "homophily"? - Answers "birds of
feather flock together"
Which of the following statements are true? (check all that apply) - Answers If you and your friend
start acting similarly, it might be that both of you are influenced by a third thing (context)
people like to connect with people like them (homophily)
Prof. Fowler and colleagues found several interesting things. Among them (check all that apply) -
Answers the stronger the friendship, the stronger the influence
your friend's happiness influences you, but only temporarily
A social group is either generous or not generous. Not much you can do about it as a single individual.
- Answers false
What did Prof. Fowler do in order to identify those people among your Facebook friends who have
more social influence on you? He identified those who - Answers are tagged in pictures
How big was the experiment that Prof. Fowler and colleagues ran during the U.S. Congressional
election in 2010? - Answers involving about 1 in 5 Americans (61 out of 325 million)
Prof. Fowler and colleagues found that it is much better to go it all alone, only relying on yourself, as
they found many examples when others can have a very negative influence on you (from obesity to
smoking). - Answers False
Which statement is wrong? - Answers in social network analysis, nodes naturally are always people
Homophily refers to: - Answers individuals associating with others who are similar
In social network analysis, when one analyses a network with different kinds of nodes, this is called -
Answers multimode network
Which statement is wrong? If you have a network involving people and technologies, you: - Answers
have to present them as two different kinds of nodes in a multi-mode network
In social network analysis, a link is naturally always communication. - Answers False
In social network analysis, when one analyses a network with different kinds of links, this is called -
Answers multiplex network
Which statement is wrong? In social network analysis: - Answers it is usually clear at first sight what
nodes and links represent
What is correct? (check all that apply) - Answers Traditional evolutionary theory focuses mainly on
node attributes
Social evolutionary pressure can select for who you are and with whom you connect
If we do not track the connections among people, we might miss an important aspect of social reality
How did Granovetter model the "strength of ties" between people? - Answers by how frequently they
interacted
Granovetter's famous concept of "the strength of the weak ties" implies that: - Answers even people
who are not strongly connected to you, can have a big influence
When you do social network analysis, it is always very clear... - Answers that things can be really
subjective
Network visualizations are so powerful, because they immediately give you a solid understanding
about the underlying network structure that governs the network. - Answers False
Let's do some traditional "stats" (even so that's not the focus of this class). Have a look at the table:
does income have anything to do with location in our "4 people society"? - Answers Yes, the average
income is 600 for urban and 250 for rural people
, What was the name of this second kind of matrix? - Answers adjacency matrix
Who does Magda connect to? (check all that apply) - Answers Magda => Maria
Magda => Juan
What was homophily again? - Answers Birds of a feather flock together
Which terms are synonyms? (check all that apply) - Answers nodes = vertices
links = edges
network = graph
links = ties
Which statements are correct? (check all that apply) - Answers triad: three connected nodes
isolate: unconnected node
pendant: node hanging onto one other node
Which actions are undirected between two people? (check all that apply) - Answers Executing a
commercial transaction
Playing tennis
Being in the same class
The difference between a walk and a path is that a walk passes only through different nodes, and a
path passes among nodes in general. - Answers False
Which is the geodesic between nodes 2 and 6? - Answers 2 => 3 => 5 => 6 or 2 => 3 => 7 => 6
Which statement is correct? (check all that apply)
The degree of a node in a network is: - Answers growing with the number of links of the node
the number of connections or edges the node has to other nodes
So lets' do that: what's the out-degree of Magda (we don't consider herself here)? To how many
OTHER people does Magda connect? - Answers 2
What is the in-degree of Magda? How many links "get to" Magda? - Answers 2
What is the minimum possible average path length of a connected network? - Answers 1
What is the link-efficient network structure of a network with an average path length close to 2? -
Answers like a star with a central hub
Two networks with the same number of nodes can have a different number of "degrees of
separation". - Answers True, since "degree of separations" are "average path length".
Milgram's famous concept of "six degrees of separation" says that in a 'friend of friends' network,
everybody is six or fewer steps away from each other. - Answers true
In social network analysis, a group of friends where everybody is equally friends with everybody else
is called: - Answers clique
In network analysis, what often happens with triangles is that: - Answers all three nodes connect to
each other
Yes, it is very likely that two of your friends will eventually also get to know each other. After this, the
three of you have become what is formally known as a: - Answers clique
In a triangle census, if one node has directed connections to both others (no other connections), this
is called - Answers Are you kidding me?!?! You want us to learn all of these?!
OK, but this one is for real: A clustering coefficient measures what? - Answers closed triangles
Who's in the center of this network? - Answers node 1
node 2
node 3
How many links does node [1] have? - Answers 4
How many steps do you need from node [1] to one of the nodes to its left? - Answers 1
Session 3 - Answers
In the social sciences, the term "social networks" refers to social media, like Facebook, Twitter,
Snapchat and Instagram. - Answers False
Prof. Fowler implies that the people you are not directly connected with (distant friends of friends)
are there, but that they do not really matter if we want to understand your behavior or that of society
at large. - Answers False
Prof. Fowler and his colleague have found that the health of a friend's friend's friend can tell me
something about your health. - Answers True
Which of the following saying was used to refer to the concept of "homophily"? - Answers "birds of
feather flock together"
Which of the following statements are true? (check all that apply) - Answers If you and your friend
start acting similarly, it might be that both of you are influenced by a third thing (context)
people like to connect with people like them (homophily)
Prof. Fowler and colleagues found several interesting things. Among them (check all that apply) -
Answers the stronger the friendship, the stronger the influence
your friend's happiness influences you, but only temporarily
A social group is either generous or not generous. Not much you can do about it as a single individual.
- Answers false
What did Prof. Fowler do in order to identify those people among your Facebook friends who have
more social influence on you? He identified those who - Answers are tagged in pictures
How big was the experiment that Prof. Fowler and colleagues ran during the U.S. Congressional
election in 2010? - Answers involving about 1 in 5 Americans (61 out of 325 million)
Prof. Fowler and colleagues found that it is much better to go it all alone, only relying on yourself, as
they found many examples when others can have a very negative influence on you (from obesity to
smoking). - Answers False
Which statement is wrong? - Answers in social network analysis, nodes naturally are always people
Homophily refers to: - Answers individuals associating with others who are similar
In social network analysis, when one analyses a network with different kinds of nodes, this is called -
Answers multimode network
Which statement is wrong? If you have a network involving people and technologies, you: - Answers
have to present them as two different kinds of nodes in a multi-mode network
In social network analysis, a link is naturally always communication. - Answers False
In social network analysis, when one analyses a network with different kinds of links, this is called -
Answers multiplex network
Which statement is wrong? In social network analysis: - Answers it is usually clear at first sight what
nodes and links represent
What is correct? (check all that apply) - Answers Traditional evolutionary theory focuses mainly on
node attributes
Social evolutionary pressure can select for who you are and with whom you connect
If we do not track the connections among people, we might miss an important aspect of social reality
How did Granovetter model the "strength of ties" between people? - Answers by how frequently they
interacted
Granovetter's famous concept of "the strength of the weak ties" implies that: - Answers even people
who are not strongly connected to you, can have a big influence
When you do social network analysis, it is always very clear... - Answers that things can be really
subjective
Network visualizations are so powerful, because they immediately give you a solid understanding
about the underlying network structure that governs the network. - Answers False
Let's do some traditional "stats" (even so that's not the focus of this class). Have a look at the table:
does income have anything to do with location in our "4 people society"? - Answers Yes, the average
income is 600 for urban and 250 for rural people
, What was the name of this second kind of matrix? - Answers adjacency matrix
Who does Magda connect to? (check all that apply) - Answers Magda => Maria
Magda => Juan
What was homophily again? - Answers Birds of a feather flock together
Which terms are synonyms? (check all that apply) - Answers nodes = vertices
links = edges
network = graph
links = ties
Which statements are correct? (check all that apply) - Answers triad: three connected nodes
isolate: unconnected node
pendant: node hanging onto one other node
Which actions are undirected between two people? (check all that apply) - Answers Executing a
commercial transaction
Playing tennis
Being in the same class
The difference between a walk and a path is that a walk passes only through different nodes, and a
path passes among nodes in general. - Answers False
Which is the geodesic between nodes 2 and 6? - Answers 2 => 3 => 5 => 6 or 2 => 3 => 7 => 6
Which statement is correct? (check all that apply)
The degree of a node in a network is: - Answers growing with the number of links of the node
the number of connections or edges the node has to other nodes
So lets' do that: what's the out-degree of Magda (we don't consider herself here)? To how many
OTHER people does Magda connect? - Answers 2
What is the in-degree of Magda? How many links "get to" Magda? - Answers 2
What is the minimum possible average path length of a connected network? - Answers 1
What is the link-efficient network structure of a network with an average path length close to 2? -
Answers like a star with a central hub
Two networks with the same number of nodes can have a different number of "degrees of
separation". - Answers True, since "degree of separations" are "average path length".
Milgram's famous concept of "six degrees of separation" says that in a 'friend of friends' network,
everybody is six or fewer steps away from each other. - Answers true
In social network analysis, a group of friends where everybody is equally friends with everybody else
is called: - Answers clique
In network analysis, what often happens with triangles is that: - Answers all three nodes connect to
each other
Yes, it is very likely that two of your friends will eventually also get to know each other. After this, the
three of you have become what is formally known as a: - Answers clique
In a triangle census, if one node has directed connections to both others (no other connections), this
is called - Answers Are you kidding me?!?! You want us to learn all of these?!
OK, but this one is for real: A clustering coefficient measures what? - Answers closed triangles
Who's in the center of this network? - Answers node 1
node 2
node 3
How many links does node [1] have? - Answers 4
How many steps do you need from node [1] to one of the nodes to its left? - Answers 1
