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| n | Improper
synchronization |
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| u | ensure a program
waiting for an I/O device |
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| receives the
signal |
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| n | Failed mutual
exclusion |
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| u | must permit only
one program at a time to |
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| perform a
transaction on a portion of data |
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| n | Deadlock |
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| u | It might happen
that 2 or more pgms wait |
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| endlessly after
each other to perform an |
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| operation. |
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