ElasticSearch ElasticSearch MCQ 3

Question 1

Which Elasticsearch API allows you to perform multiple index, update, delete, or create operations in a single request?

Accepted Answer

Bulk API (_bulk)

Answer

The Bulk API (_bulk) accepts multiple operations (index, create, update, delete) in a single HTTP request, significantly reducing network overhead.

Question 2

In Elasticsearch, what is a 'pipeline' in the context of ingest nodes?

Accepted Answer

A sequence of processors that transform documents before indexing

Answer

An ingest pipeline is a sequence of processors (e.g., grok, set, rename) that transform and enrich documents before they are indexed.

Question 3

What does the 'term' query in Elasticsearch search for?

Accepted Answer

The exact value in a field without any analysis

Answer

The term query searches for an exact, unanalyzed value in a field and is best used against keyword, numeric, or date fields.

Question 4

Which index setting controls the number of replica shards for an Elasticsearch index?

Accepted Answer

index.number_of_replicas

Answer

The 'index.number_of_replicas' setting defines how many replica copies of each primary shard to maintain, which can be changed at runtime.

Question 5

What is the 'split brain' problem in distributed Elasticsearch clusters?

Accepted Answer

When the cluster splits into two groups each thinking they are the master

Answer

Split brain occurs when network partitioning causes two sub-clusters to each elect their own master, potentially causing data inconsistency.

ElasticSearch Practice Test