ElasticSearch ElasticSearch Search & Query DSL 2

Question 1

What is a 'fuzzy' query in Elasticsearch?

Accepted Answer

A query that finds terms similar to the search term based on edit distance

Answer

A fuzzy query finds terms that are similar to the specified term using Levenshtein edit distance, allowing for typo-tolerant searches.

Question 2

What does the 'size' parameter control in an Elasticsearch search request?

Accepted Answer

The maximum number of hits returned in the response

Answer

The 'size' parameter specifies how many matching documents to include in the search results; the default is 10.

Question 3

What is the purpose of the '_source' field in an Elasticsearch search response?

Accepted Answer

It contains the original JSON document that was indexed

Answer

The '_source' field in a search response contains the original JSON document that was indexed, allowing you to retrieve the stored document data.

Question 4

What is 'pagination' in Elasticsearch and which parameters are used for it?

Accepted Answer

Using 'from' and 'size' parameters to retrieve a subset of results

Answer

Basic pagination in Elasticsearch uses the 'from' parameter to specify the starting offset and 'size' to control the number of results returned.

Question 5

What does the Elasticsearch 'highlight' feature do?

Accepted Answer

Returns snippets of matched text with search terms highlighted

Answer

The highlight feature returns fragments of matched text from the document with the query terms wrapped in highlight tags for display purposes.

ElasticSearch Practice Test