Exam 200-201 topic 1 question 181 discussion

Probalby the correct answer is D: D. new process created by parent process

The Linux tool described in the question is most likely the fork() system call, which creates a new process by duplicating the calling process. When fork() is called, it returns a process ID (PID) to the parent process and a value of 0 to the child process. If an error occurs during the fork() call, a negative value is returned. Therefore, the operation described in the question results in a new process being created by the parent process, and the process ID being sent to the parent process. This is what the fork() system call does in Linux.

The answer is: D. new process created by parent process

Correct ANS=D

i think that D is the correct answer. ==> new process created by parent process

"D" Does a child process return 0? Zero: Returned to the newly created child process. Positive value: Returned to parent or caller. The value contains process ID of newly created child process!

Each unix process has two ID numbers assigned to it: The Process ID (pid) and the Parent process ID (ppid). Each user process in the system has a parent process. Most of the commands that you run have the shell as their parent. Check the ps -f example where this command listed both the process ID and the parent process ID.

d is correcxt

The spawn(8) daemon provides the Postfix equivalent of inetd. It listens on a port as specified in the Postfix master.cf file and spawns an external command whenever a connection is established. The connection can be made over local IPC (such as UNIX-domain sockets) or over non-local IPC (such as TCP sockets). The command's standard input, output and error streams are connected directly to the communication endpoint

There are two tasks with specially distinguished process IDs: swapper or sched has process ID 0 and is responsible for paging, and is actually part of the kernel rather than a normal user-mode process. Process ID 1 is usually the init process primarily responsible for starting and shutting down the system. Originally, process ID 1 was not specifically reserved for init by any technical measures: it simply had this ID as a natural consequence of being the first process invoked by the kernel. More recent Unix systems typically have additional kernel components visible as 'processes', in which case PID 1 is actively reserved for the init process to maintain consistency with older systems