ElasticSearch ElasticSearch MCQ 4

Question 1

Which Elasticsearch mechanism automatically moves shards between nodes to balance disk usage and load?

Accepted Answer

Automatic shard rebalancing

Answer

Elasticsearch automatically rebalances shards across nodes to maintain an even distribution of data and load when nodes join or leave the cluster.

Question 2

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

Accepted Answer

The original JSON document body as provided at index time

Answer

The _source field stores the original JSON document exactly as it was indexed, enabling retrieval and partial updates without re-indexing.

Question 3

Which Elasticsearch query type allows you to find documents where a field value falls between a minimum and maximum value?

Accepted Answer

range

Answer

The range query finds documents where a field value falls within specified bounds using operators like gte, lte, gt, and lt.

Question 4

What is a 'hot-warm' architecture in Elasticsearch used for?

Accepted Answer

Separating real-time indexing nodes from nodes holding older, less-queried data

Answer

A hot-warm architecture uses high-performance 'hot' nodes for recent active data and cheaper 'warm' nodes for older, infrequently accessed historical data.

Question 5

Which Elasticsearch feature allows you to automatically roll over to a new index when an index reaches a certain size, document count, or age?

Accepted Answer

Rollover API

Answer

The Rollover API creates a new index for a data stream or index alias when the current index reaches configured thresholds like max_age, max_docs, or max_size.

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ElasticSearch ElasticSearch MCQ 4