Recall & Review
beginner
What is the purpose of retrieving a document by ID in Elasticsearch?
It allows you to quickly find and get a specific document using its unique identifier without searching through the entire index.
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beginner
Which HTTP method is used to retrieve a document by ID in Elasticsearch?
The GET method is used to retrieve a document by its ID.
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beginner
Show the basic URL format to retrieve a document by ID from an index named 'products' with ID '123'.
GET /products/_doc/123
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intermediate
What does Elasticsearch return if the document with the given ID does not exist?
It returns a JSON response with "found": false, indicating the document was not found.
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intermediate
Why is retrieving a document by ID faster than searching with a query?
Because Elasticsearch uses an internal index to directly locate the document by its unique ID, avoiding scanning multiple documents.
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Which Elasticsearch API endpoint retrieves a document by its ID?
✗ Incorrect
The GET request to /index/_doc/id retrieves the document by its ID.
What HTTP method do you use to get a document by ID?
✗ Incorrect
GET is used to retrieve data without changing it.
If a document is not found by ID, what key in the response indicates this?
✗ Incorrect
The response includes "found": false when the document does not exist.
Which part of the URL specifies the document ID when retrieving by ID?
✗ Incorrect
The document ID is the last part of the URL after _doc/.
Why is retrieving by ID more efficient than a search query?
✗ Incorrect
Retrieving by ID uses a direct lookup, making it faster.
Explain how to retrieve a document by ID in Elasticsearch and what the response looks like.
Think about the URL and the JSON keys in the response.
You got /4 concepts.
Describe why retrieving a document by ID is faster than running a search query in Elasticsearch.
Consider how Elasticsearch finds documents internally.
You got /3 concepts.