![]() This number is also called as process-id of the process.Īs we know, the operating system sets a limit on the maximum number of the processes it can deal with at a time. This number becomes the unique identification of that process and it also helps in distinguishing that process from all other processes existing in the system. Whenever a new process is created by the user, the operating system allots a number to that process. Here we will discuss the Process Control Block and its fields. PCB contains Process-Id, Process State, Process Priority, Accounting Information, Program Counter, and also some other information which helps in controlling the operations of the process. ![]() The process control block has many fields that store the relative information about that process as you can see in the above figure. ![]() These PCBs of the processes are stored in the memory that is reserved for the operating system. Whenever a user creates a process, the operating system creates the corresponding PCB for that process.
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