What is an inverted index in Elasticsearch?
a) A list of all documents in an index
b) A mapping from terms to the documents that contain them
c) A way to store metadata
d) A method for optimizing searches
Answer:
b) A mapping from terms to the documents that contain them
Explanation:
An inverted index is a data structure used in Elasticsearch to map search terms to the documents that contain them, which makes full-text search efficient.