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Which of these is a render-blocking resource by default?

  1. A An external stylesheet in the head
  2. B An image
  3. C A script with defer
  4. D A font file
Answer

An external stylesheet in the head

The browser will not paint until it has the CSSOM. Inlining critical CSS and loading the rest asynchronously improves first paint.

All Front end Development MCQs

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