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Mr. Dubey • 52.26K Points
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Q. Which of the following is one of the fundamental features of JavaScript?

  • (A) Single-threaded
  • (B) Single-threaded
  • (C) Both Single-threaded and Multi-threaded
  • (D) None of the mentioned

Correct answer: Option(A)

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Explanation by: Mr. Dubey 
One of the fundamental features of client-side JavaScript is that it is single-threaded: a browser will never run two event handlers at the same time, and it will never trigger a timer while an event handler is running, for example.

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