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Natural Language Processing Nptel Week 9 Quiz Answers
Natural Language Processing Nptel Week 9 Quiz Answers (Jan-Apr 2025)
a) Dirichlet distribution is an exponential family distribution b) LDA is a generative model c) Dirichlet distribution is taken over the simplex, i.e., positive vectors that sum to one d) A higher value of alpha will assign fewer topics to each document, whereas a high value of alpha will have the opposite effect
You have a topic model with the parameters α = 0.8 and β = 0.03. Now, if you want to have a sparser distribution over words and a denser distribution over topics, what should be the values for α and β?
a) Both α and β values should be decreased b) Both α and β values should be increased c) α should be decreased, but β should be increased d) α should be increased, but β should be decreased
In Gibbs sampling, choose the correct option from below:
a) It cannot directly estimate the posterior distribution over z b) It is a form of Markov Chain Monte Carlo c) Here, sampling is done in parallel d) Sampling is stopped before sampled values approximate the target distribution
