Yes; a process is the execution process of a program. In the early process-oriented computer architecture, the process was the basic execution entity of the program; in the contemporary thread-oriented computer architecture, the process is the container of threads. A program is a description of instructions, data and their organization, and a process is the entity of the program.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Yes; a process is the execution process of a program.
Narrow definition: A process is an instance of a computer program that is being executed.
Broad definition: A process is a running activity of a program with certain independent functions on a certain data collection. It is the basic unit of dynamic execution of the operating system. In traditional operating systems, the process is both the basic allocation unit and the basic execution unit.
The concept of process has two main points: First, the process is an entity. Each process has its own address space, which generally includes a text region, a data region, and a stack region. The text area stores the code executed by the processor; the data area stores variables and dynamically allocated memory used during process execution; and the stack area stores instructions and local variables for active procedure calls. Second, a process is an "executing program." A program is an inanimate entity. Only when the processor gives life to the program (executed by the operating system) can it become an active entity. We call it a process. [3]
Process is the most basic and important concept in the operating system. It is a concept introduced after the emergence of multi-programming systems in order to describe the dynamic conditions within the system and describe the activity rules of each program within the system. All multi-programming operating systems are based on processes.
Features
Dynamicity: The essence of a process is an execution process of a program in a multi-programming system. The process is dynamically generated and dies dynamically.
Concurrency: Any process can execute concurrently with other processes
Independence: A process is a basic unit that can run independently, and it is also an independent unit for system allocation and scheduling;
Asynchronicity: Due to the mutual constraints between processes, the process has intermittent execution, that is, the processes advance at independent and unpredictable speeds
Structural features: The process consists of programs, It consists of three parts: data and process control blocks.
Multiple different processes can contain the same program: a program constitutes different processes in different data sets and can obtain different results; but during execution, the program cannot change.
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