is the Activity of obtaining material which can be documents of unstructured nature

• Information Retrieval

• Boolean Retrieval

• Dictionary Retrieval

• Tolerant Retrieval

Three major component of Information Retrieval system are document subsystem ,Retrieval Subsystem and

• User Subsystem

• Query Subsystem

• Feedback Problem

• Subsystem

is the unit of information that we want to return as a result of

• Documents

• Collection

• Posting List

• Index

is the topic about which the user desires to know more

• Query

• Information Need

• Term

• Document

is the smallest unit of information in a query

• Term

• Document

• Word

• Index

Permuterm index is a index form of index

• Inverted

• Real

• Term

• Dictonary

A Query like mon is called as wildcard query

• Trailing

• Heading

• New

• Real

algorithm is the algorithm for phonetic hashing

• Soundex

• Phonetic

• k-gram

• Edit distance

Edit distance type of spelling correction is

• Isolated term correction

• Context Sensitive correction

• k-gram correction

• both A and B

In Permuterm index symbol is used to mark the end of a term

• $

• %

• &