When a server receives a request with an If-None-Match header that matches the current ETag, what HTTP status code should it return?

easy📝 Conceptual Q2 of 15

Rest API - Caching Strategies

When a server receives a request with an If-None-Match header that matches the current ETag, what HTTP status code should it return?

A200 OK

B304 Not Modified

C404 Not Found

D500 Internal Server Error

Step-by-Step Solution

Solution:

Step 1: Understand the meaning of matching ETags
If the ETag in If-None-Match matches the current resource ETag, the resource has not changed.
Step 2: Identify the correct HTTP response
The server should respond with 304 Not Modified to tell the client to use its cached version.
Final Answer:
304 Not Modified -> Option B
Quick Check:
Matching ETag response = 304 Not Modified [OK]

Quick Trick: Matching ETag means send 304 Not Modified [OK]

Common Mistakes:

MISTAKES

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