Q
Is browser JavaScript multithreaded on the main thread?
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A
Yes, each function runs on its own thread
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B
Only in Chrome
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C
No; it runs on a single main thread with an event loop, and Web Workers provide background threads
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D
Yes, when async is used
Correct Answer:
C. No; it runs on a single main thread with an event loop, and Web Workers provide background threads
Explanation:
Long-running scripts block the user interface.
ALSO KNOW (related points):
• Which web font format is the most efficient and universally supported in modern browsers? → WOFF2
