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Multiple Browsers
Caching & Performance
Beginner
Q
What does a browser send to revalidate a cached resource that has an ETag?
AA full new GET with no headers
BIf-Match with the file size
CA HEAD request only
DIf-None-Match with the ETag value; the server replies 304 Not Modified if the resource is unchanged
Correct Answer:
D. If-None-Match with the ETag value; the server replies 304 Not Modified if the resource is unchanged
Explanation:
A 304 response has no body, which saves bandwidth.
ALSO KNOW (related points):
• Which statement about Chrome's architecture is correct? → It is multi-process, with separate renderer processes (site isolation), so one crashed tab does not crash the whole browser
