João Gondim - MO412

Given the following image, corresponding to the average neighbors' degree of three different networks that have the same number of nodes and links, which alternative correctly matches the type of degree correlations and the hatch symbols? A) (  , Neutral),           ( ,  Disassortative),  ( , Assortative) B) (  , Disassortative), ( ,  Neutral),            ( , Assortative) C) (  , Assortative),      ( ,  Disassortative), ( , Neutral) D) (  , Assortative),      ( ,  Neutral),            ( , Disassortative) E) None of the above. Original idea by: João Medrado Gondim

A research group is creating a new social media platform and wants to model its growth using the Barabási–Albert model. They start with a small group of well-connected users. According to the principles of this model, which of the following strategies will most likely lead to the formation of a scale-free network, characteristic of real-world social platforms? A) Each new user connects to existing users at random, with equal probability, regardless of how many followers those users already have. B) Each new user connects to existing users with a probability proportional to their current number of followers (popular users are more likely to attract new followers). C) Each new user connects only to the newest users who joined in the previous step, ensuring recent users stay active and visible. D) Restrict new users to connecting only with users in their immediate geographical surroundings to create localized clusters. E) None of the above. Original idea by: João Medrado Gondim