Information Retrieval_Module_1_Quiz

What is Information Retrieval?

The process of removing most common words (and, or, the, etc.) by an information retrieval system before indexing is known as

• a) Lemmatization

• b) Stop word removal

• c) Inverted indexing

• d) Normalization

How the information retrieval problem can be defined formally?

• a) a triple

• b) a quadruple

• c) a couple

• d) None of the above

Answer explanation

Answer: (b) a quadruple (4-tuple)

IR model can be defined as 4-tuple [D, Q, F, R(q,j)] where D refers to the collection of documents, Q refers to the query collection, F refers to the framework for modeling documents and queries, and R refers to the ranking function to associate a rank to the query and the document.

The count of occurrences of a word in a document is referred as

• a) document frequency

• b) term frequency

• c) collection frequency

• d) change frequency

• 
  In information retrieval, extremely common words which would appear to be of little value in helping select documents and are excluded from the index vocabulary are called:

• • A. 

    Stop words

• • B. 

    Tokens

• • C. 

    Lemmatized words

• • D. 

    Stemmed terms

Explain the Step or Process of Information Retrieval?

Define Precision, Recall and F-Score?

what are the different issues in information Retrieval?

What are the Different trends in information Retrieval?

Write a short note on IR Web and Digital Libraries