System Design · Junior · Question 55 of 75

What does a `304 Not Modified` response mean?

✓Correct answer: The cached copy is still valid, so the server sends no body and the browser uses its cache
2The page was deleted
3The server is overloaded

Explanation

It's the result of a conditional request with If-None-Match (ETag) or If-Modified-Since, saving bandwidth.

Further reading

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