Elasticsearch Interview Questions and Answers
Ques 21. What is the purpose of the 'Query DSL' in Elasticsearch?
The Query DSL (Domain Specific Language) allows users to define queries and filters using a JSON-like syntax.
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Ques 22. How does Elasticsearch handle schema-less data?
Elasticsearch allows dynamic mapping, automatically inferring field data types based on the inserted documents.
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Ques 23. What is the purpose of the 'Refresh' operation in Elasticsearch?
Refresh makes changes to the index immediately visible for search, but it comes with a performance cost.
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Ques 24. Explain the role of 'Filter' in Elasticsearch queries.
Filters are used to narrow down the search results based on specific criteria without affecting scoring.
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Ques 25. What is the purpose of the 'Aggregation' framework in Elasticsearch?
Aggregations provide the capability to perform complex analysis and computation on the data.
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