Elasticsearch easy
Every document stored in an Elasticsearch index is uniquely tracked by which mandatory metadata field?
- A The `_source` key-value map.
- B The `_id` field.
- C The `_sharding_key` integer.
- D The `_author` username.
Answer: B. The `_id` field.
If the developer does not provide an `_id`, Elasticsearch will automatically generate a random, unique string. This ID is used for GET operations, updates, and deletes.
One system design question a day, with spaced repetition so the ones you miss come back.
Get the appRelated questions
- What are the two primary reasons for configuring one or more 'Replica Shards' for an index?
- When a String field is mapped as `text`, what process is performed to enable full-text search capability?
- What is the primary benefit of splitting an Elasticsearch index into multiple 'Primary Shards'?
- Elasticsearch search results include a metadata field called `_score`. What does this value primarily indicate?
- What is the primary architectural purpose of Elasticsearch in a modern software stack?
- In the standard Elastic Stack architecture, what is the primary function of **Kibana**?