[Solved] What does the HTTP status code 401 Unauthorized indicate in a REST API? — Ans: The client is not authenticated or provided invalid credentials. | Rest API

Rest API - HTTP Status Codes

What does the HTTP status code 401 Unauthorized indicate in a REST API?

AThe client is not authenticated or provided invalid credentials.

BThe client is authenticated but does not have permission to access the resource.

CThe requested resource was not found on the server.

DThe server encountered an internal error while processing the request.

Step-by-Step Solution

Solution:

Step 1: Understand the meaning of 401 Unauthorized
The 401 status code means the client must authenticate itself to get the requested response. It usually means no or bad login info.
Step 2: Differentiate from 403 Forbidden
403 means the client is authenticated but lacks permission. 401 means no valid authentication.
Final Answer:
The client is not authenticated or provided invalid credentials. -> Option A
Quick Check:
401 Unauthorized = No or bad login info [OK]

Quick Trick: 401 means login problem; 403 means no permission [OK]

Common Mistakes:

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