Find the bug in this REST API code that should return 409 Conflict on duplicate resource creation: def create_user(user): if user_exists(user['email']): return {"error": "User already exists"}, 400 else: save_user(user) return {"message": "User created"}, 201

medium📝 Debug Q7 of 15

Rest API - HTTP Status Codes

AThe function should return 404 if user exists.

BThe save_user function is called incorrectly.

CThe error message should be "Conflict error".

DIt should return 409 Conflict, not 400 Bad Request, on duplicate user.

Step-by-Step Solution

Solution:

Step 1: Understand the correct status for duplicate resource
When a resource already exists, the API should return 409 Conflict, not 400 Bad Request.
Step 2: Identify the incorrect status code in the code
The code returns 400, which is incorrect for this conflict scenario.
Final Answer:
It should return 409 Conflict, not 400 Bad Request, on duplicate user. -> Option D
Quick Check:
Duplicate resource creation = 409 Conflict [OK]

Quick Trick: Use 409 for duplicates, not 400 Bad Request [OK]

Common Mistakes:

Returning 400 instead of 409
Wrong error message text
Returning 404 for existing resource

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Find the bug in this REST API code that should return 409 Conflict on duplicate resource creation: def create_user(user): if user_exists(user['email']): return {"error": "User already exists"}, 400 else: save_user(user) return {"message": "User created"}, 201

Step 1: Understand the correct status for duplicate resource

Step 2: Identify the incorrect status code in the code

Final Answer:

Quick Check:

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