ElasticSearch ElasticSearch Cluster Management & Administration 2

Question 1

Which node role in Elasticsearch is responsible for hosting document data and executing data-related operations like search and CRUD?

Accepted Answer

data

Answer

master

Answer

ingest

Answer

coordinating

Question 2

What did the discovery.zen.minimum_master_nodes setting control in Elasticsearch versions prior to 7.0?

Accepted Answer

The quorum of votes needed to elect a master and prevent split-brain

Answer

The maximum number of master nodes allowed

Answer

Which nodes are eligible to become master

Answer

The number of voting-only nodes in the cluster

Question 3

What does the node.roles configuration setting define in Elasticsearch 7.9 and later?

Accepted Answer

Defines the functional roles assigned to a specific node

Answer

Lists all currently active nodes in the cluster

Answer

Sets the maximum number of roles permitted per cluster

Answer

Configures role-based access control for API endpoints

Question 4

Which API is used to update cluster-wide settings dynamically without restarting any Elasticsearch nodes?

Accepted Answer

PUT /_cluster/settings

Answer

POST /_nodes/reload_secure_settings

Answer

PUT /_cluster/reroute

Answer

POST /_cluster/update

Question 5

What is the key difference between 'persistent' and 'transient' settings in the Elasticsearch cluster settings API?

Accepted Answer

Persistent settings survive full cluster restarts; transient settings are lost on full cluster restart

Answer

Persistent settings apply to all nodes; transient settings apply only to the master

Answer

Persistent settings are read-only; transient settings can be changed at any time

Answer

Persistent settings require a node restart; transient settings take effect immediately

Question 6

What is the primary function of an 'ingest' node in Elasticsearch?

Accepted Answer

Pre-processing documents through ingest pipelines before indexing

Answer

Coordinating bulk indexing requests across data nodes

Answer

Ingesting data streams directly from external sources like Kafka

Answer

Managing the cluster's overall indexing throughput capacity

Question 7

What role do coordinating-only nodes play in an Elasticsearch cluster?

Accepted Answer

They route requests, merge results, and handle scatter-gather without storing data

Answer

They coordinate master election between master-eligible nodes

Answer

They store coordination metadata for the cluster state

Answer

They manage cross-cluster replication coordination between clusters