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Ch4 行程與執行緒管理
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41. Process、Fork、Thread、Context Switch
#OS-04-041
易
Process
Fork
Thread
Context Switch
📝
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Which of the following statements on process are true?
A
(a) In UNIX, a new process is created by the
fork()
system call. The new process consists of a copy of the address space of the original process.
B
(b) A thread shares with other threads belonging to the same process its code section, data section, stack, and other operating-system resources, such as open files and signals.
C
(c) With using standard C library, user program can easily read or write a file from storage devices without the help from operating systems.
D
(d) When a context switch occurs, the kernel saves the context of the old process in its PCB and loads the saved context of the new process scheduled to run. The context includes the value of the CPU registers, the process state, and memory-management information.
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