You want to design an API endpoint to update user profile data safely. Which approach ensures idempotency and avoids duplicate updates if the client retries the request multiple times?

hard📝 Application Q15 of 15

Rest API - HTTP Methods

AUse PUT method to update the entire user profile with the same data each time

BUse GET method with query parameters to update user data

CUse PATCH method to partially update user data without tracking changes

DUse POST method to update user data with a unique request ID

Step-by-Step Solution

Solution:

Step 1: Understand idempotent update methods
PUT replaces the entire resource and is idempotent, so repeated calls with the same data do not cause duplicate changes.
Step 2: Evaluate options for safe updates
POST is not idempotent, PATCH is not guaranteed idempotent, GET should not modify data. PUT is the best choice for safe, repeatable updates.
Final Answer:
Use PUT method to update the entire user profile with the same data each time -> Option A
Quick Check:
PUT ensures idempotent updates = D [OK]

Quick Trick: PUT replaces resource fully, safe for retries [OK]

Common Mistakes:

MISTAKES

Using POST for updates expecting idempotency
Assuming PATCH is always idempotent
Trying to update data with GET

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You want to design an API endpoint to update user profile data safely. Which approach ensures idempotency and avoids duplicate updates if the client retries the request multiple times?

Step 1: Understand idempotent update methods

Step 2: Evaluate options for safe updates

Final Answer:

Quick Check:

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