Does an asynchronous call always create/call a new thread?

Posted by Ted Smith on Stack Overflow See other posts from Stack Overflow or by Ted Smith
Published on 2009-02-28T18:29:31Z Indexed on 2010/04/01 5:03 UTC
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multithreading

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async

Does asynchronous call always create a new thread?

Example:

If Javascript is single threaded then how can it do an async postback? Is it actually blocking until it gets a callback? If so, is this really an async call?

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