[理工] [os] 行程同步
是非題:
1.System calls are executed with privileged instruction which are not
supposed to be used by user program.
2.In practice, the SJF scheduling algorithm may not be optimal in
average waiting time.
3.The technology of virtual memory system may fail for some specific
CPU instruction sets.
4.The final value of the shared data depends upon which of concurrent
processes finish last.
5.Several processes can access and manipulate shared data concurrently,
by sharing a code segment.
順便請問一下process fork()後共用code section，不共用data section，
這樣他們算共享address space嗎? 如果是的話是共享code section的address space
還是data section的?
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