ElasticSearch ElasticSearch 2

Question 1

What is the default number of primary shards for an index created in Elasticsearch 7.x and later?

Accepted Answer

1

Answer

Starting with Elasticsearch 7.0, the default number of primary shards per index was changed from 5 to 1.

Question 2

Which Elasticsearch query type is used to find documents where a field value falls within a specified range?

Accepted Answer

range query

Answer

The range query returns documents where a field value falls within a specified range using gte, gt, lte, or lt parameters.

Question 3

What does the `_source` field in an Elasticsearch document contain?

Accepted Answer

The original JSON document as indexed

Answer

The `_source` field stores the original JSON body of the document as it was passed at index time.

Question 4

Which aggregation type in Elasticsearch computes the average value of a numeric field?

Accepted Answer

avg aggregation

Answer

The avg aggregation is a single-value metrics aggregation that computes the average of numeric values extracted from the aggregated documents.

Question 5

What is the purpose of the Elasticsearch `alias` feature?

Accepted Answer

To create a secondary name pointing to one or more indices

Answer

An alias is a secondary name for one or more indices, enabling zero-downtime reindexing and abstracting the underlying index name from applications.

ElasticSearch Practice Test