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Why is it important to send the full resource representation in a PUT request instead of only changed fields?

hard📝 Conceptual Q10 of 15
Rest API - HTTP Methods
Why is it important to send the full resource representation in a PUT request instead of only changed fields?
ABecause PUT automatically merges data with existing resource
BBecause PUT replaces the entire resource, missing fields are removed
CBecause PUT is only for creating new resources
DBecause servers reject partial data in PUT requests
Step-by-Step Solution
Solution:

  1. Step 1: Understand PUT semantics

    PUT replaces the entire resource at the URL with the provided data.

  2. Step 2: Missing fields in PUT cause deletion

    If fields are missing, they are removed from the resource, so full data is needed.

  3. Final Answer:

    Because PUT replaces the entire resource, missing fields are removed -> Option B

  4. Quick Check:

    PUT requires full resource to avoid data loss [OK]
Quick Trick: PUT replaces whole resource; missing fields get deleted [OK]
Common Mistakes:
MISTAKES
  • Thinking PUT merges data
  • Assuming PUT only creates resources
  • Believing servers reject partial PUT data

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