What is the problem of incidence matrix in large collections?

If we have 1 million documents and 500,000 terms, total cells = ?

What is the biggest drawback of the Boolean model?

Which systems still use the Boolean model?

Which operation increases results?

Example of a Union query:

Example of an Intersection query:

What happens if no document matches the query?
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What is the purpose of using an inverted index?

What are the components of an inverted index?

What does the dictionary contain?

What do postings lists contain?

What is the first step in building an inverted index?

Tokenization means:

Challenge in Hewlett-Packard during tokenization:

Query: wink AND drink means:

What distinguishes positional index from normal index?

Purpose of positional index?

Drawback of positional index?

Query NEAR/3 means:

Purpose of stop words removal?