When referring to the critical rendering path in site performance, a critical resource is:
1:-any resource that returns 404
2:-a resource that could block initial display of the page
3:-any resource that must be loaded
4:-a resource that takes more than 500ms to load
Correct answer is:
a resource that could block initial display of the page.
Explanation: A critical resource is a resource that could block initial rendering of the page. The fewer of these resources, the less work for the browser, the CPU, and other resources.