If the parent process is terminated before its children, what will the PPID column show in the ps command?

If the parent process is terminated before its children, the PPID (Parent Process ID) column in the ps command will typically show 1.

In Unix-like operating systems, when a parent process terminates before its children, the orphaned child processes are typically adopted by the init process, which has a process ID (PID) of 1. As a result, the PPID of these orphaned child processes becomes 1 to indicate that they are now under the care of the init process.