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Complications Arise in Time-Sharing Systems

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What complications could arise in a time-sharing system if two processes require access to the same file at the same time? Are there cases in which the file manager should grant such requests? Are there cases in which the file manager should deny such requests?

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Note if the both process A and B just read the same file at same time will NOT causes no issues at all.
These are the following complications could arise in a time-sharing system if two processes require access to the same file at the same time:

Case 1: While process A start reading the record and the Process A makes changes to the record in the file.
During those changes are being made by process A, the same record is being read by the second process B, will get old version of the data as the ...

Solution Summary

The expert examines the complications which arise in the time-sharing system if two processes require access to the same file at the same time.

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