Question

List and explain system calls related to process and job control.

Answer 1

System call provides the services of the operating system of the user programes via Application Program Interface (API). It provides an interface between a process and operating system to allow user-level processes to request the services of the operating system.

Types are:process control, file manipulation,device manipulation, information maintanence and communication.

Job Control: a job running in the foreground can be stopped by typing the suspend character .This sends the "terminal stop" signal to the process group.SIGTSTP causes processes receiving it to stop and control is returned to the shell.

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