consistent with, this model? A. A message can be conceptualized as an event drawn from a sample space of possible messages. B. All messages are produced by an information source.
1) Shannon's model of communication presupposes a simple model of text as a message. Which of the following are part of, or consistent with, this model?
A. A message can be conceptualized as an event drawn from a sample space of possible messages.
B. All messages are produced by an information source.
C. A message is a sequence of symbol instances drawn from a finite set of symbols.
D. Information sources possess language models.
2) Language models are fundamental to text analytics. Which of the following are true statements about language models?
A. Language models allow you to predict the next word in a sentence.
B. Language models come in a variety of forms, from simple unigram models to more complex models based on many possible states.
C. Language models appear in many forms and contexts, such as topic models and Naive Bayes classifiers.
D. Language models always encode explicit grammatical rules that are similar to those learned by speakers of a language in school.
3) In this course, we have emphasized the importance of a data model to organize all the data associated with the text analytics pipeline. Which of the following are true of this model?
A. Databases built on this model can be used to develop interactive web applications.
B. The model contains tables for both tokenized representations of text and token types (terms) that appear in the token table.
C. The data model must be implemented in a relational
D. The model is useful as a way to conceptualize the relationships between the various kinds of data associated with text analytics, from metadata associated with source material to the by-products of unsupervised methods like topic modeling.
4) Entropy is a fundamental concept in text analytics. Which of the following concepts are based on entropy?
A. precision
B. mutual information
C. perplexity
D. hidden Markov models
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