ElasticSearch Technology & Digital Applications 5

Question 1

What is the purpose of the '_reindex' API in Elasticsearch?

Accepted Answer

To copy documents from one index to another, optionally transforming them

Answer

The _reindex API copies documents from a source index to a destination index, allowing you to apply new mappings, settings, or transformations.

Question 2

Which Elasticsearch concept describes the process of breaking text into tokens during indexing?

Accepted Answer

Analysis

Answer

Analysis is the process of converting text into tokens (terms) using character filters, tokenizers, and token filters defined in an analyzer.

Question 3

What does the 'search_after' parameter in Elasticsearch provide?

Accepted Answer

Efficient deep pagination using the last result's sort values as a cursor

Answer

search_after enables efficient pagination by using sort values from the last returned document as a cursor, avoiding the performance penalties of deep from/size pagination.

Question 4

In Elasticsearch, what is the 'split brain' problem?

Accepted Answer

When network partition causes multiple nodes to independently elect themselves as master

Answer

Split brain occurs when a cluster is partitioned and multiple nodes each believe they are the master, potentially causing data inconsistency.

Question 5

Which Elasticsearch feature would you use to search for documents where a field value falls within a specific date range?

Accepted Answer

range query on a date field

Answer

The range query with gte, lte, gt, or lt parameters on a date field allows filtering documents by date ranges, supporting various date math expressions.

ElasticSearch Practice Test

ElasticSearch Practice Test

ElasticSearch Technology & Digital Applications 5