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Multiple ChoiceBeginner 30s

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Choose the best answer for: JavaScript threading model
Options
  1. 1JavaScript is multi-threaded with a worker thread for each task
  2. 2JavaScript creates a thread per tab and shares memory between them
  3. 3JavaScript has no async model and runs callback functions serially
  4. 4JavaScript is single-threaded with an event loop for async operations
javascriptbeginner

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