[Solved] A developer wrote this PUT request handler in a REST API:def put_user(user_id, data): user = get_user(user_id) user.... | Rest API

Rest API - HTTP Methods

A developer wrote this PUT request handler in a REST API:

def put_user(user_id, data):
    user = get_user(user_id)
    user.update(data)
    save_user(user)

What is the main problem with this code regarding PUT semantics?

AIt does not save the user after update

BIt deletes the user before updating

CIt partially updates the user instead of fully replacing it

DIt uses the wrong HTTP method

Step-by-Step Solution

Solution:

Step 1: Analyze the update method usage
Using user.update(data) merges new data into existing user, causing partial update.
Step 2: Compare with PUT full replacement
PUT requires replacing the entire resource, not merging fields.
Final Answer:
It partially updates the user instead of fully replacing it -> Option C
Quick Check:
PUT must fully replace resource, not partial update [OK]

Quick Trick: PUT replaces whole resource; update() merges partially [OK]

Common Mistakes:

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