ElasticSearch Case Studies & Practical Application 4

Question 1

A real-estate app needs to find all properties within 10 km of a user's location. Which Elasticsearch query should be used?

Accepted Answer

Geo distance query

Answer

The geo distance query returns documents where a geo_point field falls within a specified radius from a center coordinate.

Question 2

A startup indexes user-generated reviews. They need to surface the most helpful reviews first while still factoring in relevance to the search query. What is the best approach?

Accepted Answer

Use function score combining BM25 score with a field_value_factor on helpful_votes

Answer

Function score with field_value_factor blends the text relevance score with numeric signals like helpful_votes into a single composite score.

Question 3

An engineering team notices that bulk indexing throughput drops dramatically during peak search traffic. Which configuration change reduces this contention?

Accepted Answer

Use separate node roles: dedicated data nodes and dedicated coordinating nodes

Answer

Assigning dedicated coordinating nodes for search and dedicated data nodes for indexing separates workloads, preventing indexing from competing with search resources.

Question 4

A media company ingests video metadata and wants to allow 'did you mean?' spell-correction suggestions. Which Elasticsearch suggester should they implement?

Accepted Answer

Phrase suggester

Answer

The Phrase suggester evaluates multi-word corrections using n-gram language models, making it ideal for 'did you mean?' sentence-level corrections.

Question 5

A logistics company stores package tracking events and queries them by package_id. They notice queries are always slow despite the field being indexed. What should they check first?

Accepted Answer

Whether package_id is mapped as text instead of keyword

Answer

A text-mapped package_id field is analyzed and cannot use efficient term-level lookups; remapping it to keyword enables fast exact-match queries.

ElasticSearch Practice Test

ElasticSearch Practice Test

ElasticSearch Case Studies & Practical Application 4