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2014329600146_傅宇虹 (28.218.81608.81609.81613.222.81848.81863)

What is process?The difference of the process and the program. A process can be thought of as a program in execution, which forms the basis of all computation. A process is the unit of work in the most systems. A process also can be known as the text section, including the current activity, stack and heap. Early computer systems allowed only one program to be executed at a time, however, current-day computer systems allow multiple programs to be loaded into memory and more compartmentalization of the various programs. And these needs resulted in the nation of a process. A program by itself is not a process; a program is a passive entity, such as a file containing a list of instructions stored on disk (often called an executed file), whereas a process is an active entity, with a program counter specifying the next instruction to execute and a set of associated resources. A program becomes a process when an executable file is loaded into memory.

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