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Elasticsearch Interview Questions

Elasticsearch Interview Questions: Elasticsearch is a highly scalable open-source full-text search engine.
Q: What is Elasticsearch?
Elasticsearch is a search engine based on Apache Lucene that supports full-text

Elasticsearch can be used to search different kinds of documents that provide scalable search, multi-tenancy, and real-time search.

Elasticsearch is developed in Java (Developed By - Shay Banon) and is released as open source under the terms of the Apache License.

Q: What is Query Language in Elasticsearch?

ElasticSearch uses apache lucene query language, which is called Query DSL.

Q: What is Inverted Index in Elasticsearch?

Elasticsearch uses a structure called an inverted index, which is designed to allow very fast full-text searches. An inverted index consists of a list of all the unique words that appear in any document, and for each word, a list of the documents in which it appears.

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Q: What is a Tokenizer in Elasticsearch?

In simple word - Tokenizers break down a string into stream of tokens.

Q: Does Elasticsearch have a schema?

Yes, Elasticsearch can have a schema.

Q: What are the advantages of Elasticsearch?

Following are the advantages of Elasticsearch:

  1. Elasticsearch is compatible on any platform.
  2. Elasticsearch cluster is distributed, scalable and most important easy to integrate.
  3. Elasticsearch REST uses JSON objects, works perfectly with different programming languages.
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