Text Classification in Information Retrieval
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Questions and Answers

What is the key challenge in information retrieval (IR) that differentiates it from traditional database (DB) systems?

  • IR systems need to provide a ranking of results, while DB systems only need to provide a binary yes/no answer.
  • IR systems need to focus on relevance, while DB systems only need to focus on exact matches. (correct)
  • IR systems need to deal with the different forms of documents and queries, unlike DB systems which only handle a single, consistent format.
  • IR systems need to handle both structured and unstructured data, unlike DB systems which only handle structured data.

    • Which of the following is the simplest retrieval model described in the text?

  • Boolean Retrieval Model
  • Google's PageRank algorithm
  • Term-Document Incidence Matrix
  • Bag-of-Words trick (correct)

    • What is the key difference between documents and queries in information retrieval systems?

  • Documents are long-form text, while queries are typically short phrases.
  • Documents are static, while queries are dynamic and change over time.
  • Documents are structured data, while queries are unstructured data.
  • Documents and queries use different forms, which is a key challenge in IR. (correct)

    • What is the purpose of the Term-Document Incidence Matrix mentioned in the text?

    <p>It is used to represent the Boolean Retrieval Model.</p> Signup and view all the answers

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