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In a REST API, what scenario typically results in a 422 Unprocessable Entity response?

easy📝 Conceptual Q1 of 15
Rest API - HTTP Status Codes
In a REST API, what scenario typically results in a 422 Unprocessable Entity response?
AWhen the requested resource is not found on the server
BWhen the request syntax is correct but the semantic content is invalid
CWhen the client is unauthorized to access the resource
DWhen the server encounters an unexpected error
Step-by-Step Solution
Solution:
  1. Step 1: Understand HTTP status codes

    422 indicates the server understands the request syntax but cannot process the instructions due to semantic errors.
  2. Step 2: Differentiate from other codes

    404 means resource not found, 401 means unauthorized, 500 means server error, none of which fit semantic validation issues.
  3. Final Answer:

    When the request syntax is correct but the semantic content is invalid -> Option B
  4. Quick Check:

    422 = semantic error, not syntax or auth [OK]
Quick Trick: 422 means semantic errors, not syntax or auth issues [OK]
Common Mistakes:
MISTAKES
  • Confusing 422 with 400 Bad Request which is for syntax errors
  • Assuming 422 means resource not found
  • Mixing 422 with authorization errors

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