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| n | Concurrent
processes (or threads) often |
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| need to share
data (maintained either in |
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| shared memory
or files) and resources |
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| n | If there is no
controlled access to shared |
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| data, some
processes will obtain an |
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| inconsistent
view of this data |
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| n | The action
performed by concurrent |
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| processes
will then depend on the order in |
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| which their
execution is interleaved |
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