ElasticSearch Trivia 5

Question 1

What Elasticsearch component processes and transforms data before it is indexed, using a series of processors?

Accepted Answer

Ingest Pipeline

Answer

Ingest Pipelines are node-level processing chains that apply processors (e.g., grok, date, rename) to documents before they are indexed.

Question 2

Which Elasticsearch query type finds documents where a field's value falls within a specified range?

Accepted Answer

Range query

Answer

The range query matches documents with field values between specified upper and lower bounds, supporting dates, numbers, and strings.

Question 3

What is a 'data stream' in Elasticsearch primarily designed for?

Accepted Answer

Time-series data that is append-only

Answer

Data streams are designed to handle time-series data (like logs and metrics) by managing a series of backing indices automatically.

Question 4

What does the 'dynamic mapping' feature do in Elasticsearch when a new field is encountered?

Accepted Answer

Automatically detects and maps the field type

Answer

Dynamic mapping allows Elasticsearch to automatically detect field types (string, number, date, etc.) and add them to the index mapping.

Question 5

Which Elasticsearch feature sends alerts based on query results or metric thresholds?

Accepted Answer

Watcher (Alerting)

Answer

Watcher (now part of Kibana Alerting) monitors data using scheduled queries and triggers actions like emails or webhooks when conditions are met.

ElasticSearch Practice Test