[Solved] Consider this update request:POST /products/_update/42 { "doc": { "price": 19.99 } }What will be the value of the price field after this update? | Elasticsearch

Elasticsearch - Document Operations

Consider this update request:

POST /products/_update/42
{
  "doc": {
    "price": 19.99
  }
}

What will be the value of the price field after this update?

AThe <code>price</code> field will be incremented by 19.99

BThe entire document will be replaced with only the <code>price</code> field set to 19.99

CThe update will fail because the entire document is required

DThe <code>price</code> field will be set to 19.99, other fields remain unchanged

Step-by-Step Solution

Solution:

Step 1: Understand partial updates
The _update API with doc updates only specified fields.
Step 2: Effect on other fields
Other fields in the document remain unchanged unless explicitly updated.
Step 3: Validate options
The price field will be set to 19.99, other fields remain unchanged correctly describes the behavior. The entire document will be replaced with only the price field set to 19.99 is incorrect because the document is not replaced. The update will fail because the entire document is required is wrong; partial updates are allowed. The price field will be incremented by 19.99 is incorrect; the field is set, not incremented.
Final Answer:
The price field will be set to 19.99, other fields remain unchanged -> Option D
Quick Check:
Update with doc modifies fields, does not replace document [OK]

Quick Trick: Update with doc changes fields, leaves others intact [OK]

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