executing a command on a variable used by multiple threads

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Given the threading scenario where two threads execute the computation:

 x = x + 1 where x is a shared variable

What are the possible results and describe why your answer could happen.

This is a textbook problem from my OS book and I was curious if I needed more information to answer this such as what x is initialized too and how often the threads execute this command or just once. My answer originally was that it could be two possible answers depending on the order that the threads execute them by the OS.

asked 35 secs ago

user3037172

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executing a command on a variable used by multiple threads