What Is A Process ?
Process Concept: A process is a program in execution. When we code something to get desired output we call the code as program and the execution of the program as process. A process is an active entity and program is a passive entity.
When a program is executed then it becomes a process. The process memory is divided into 4 parts:
- Stack: It is a form of memory mechanism which is used to store local variables. Stack contains temporary data.
- Text section: It contains compiled code, which is read in non-volatile memory.
- Heap: It is used for dynamic memory allocation.
- Data: It contains the global and static variables.
Attributes of a process:
- Process Id – Unique Identifier given by OS
- Process State – Running, Ready, etc.
- CPU registers – It must be saved and restored.
- Accounts information – Amounts of CPU used.
- I/O status information – Device allocated to the process.
- CPU scheduling information – Priority given to a process.
