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Information Retrieval and Web Search Engines Winter Semester 2014/2015

Profr. Dr. Wolf-Tilo Balke and José Pinto

Homework Assignment 1

Exercise 1.1

What is an “information need” and how it connects to “relevance” and “query”

in information retrieval?

Exercise 1.2

What is the difference between the bag of words model and the set of words model?

Exercise 1.3

Why the size of the returned set of a Boolean Query is difficult to control?

Exercise 1.4

Explain the differences between Information Retrieval and Web Search.

Exercise 1.5

Why in the Boolean Retrieval Model many relevant documents are not found after performing a query?

Exercise 1.6

What is an inverted index and what’s the motivation for using it?

Exercise 1.7

What is the difference between “information retrieval” and “data retrieval”?

Referenzen

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