Knowledge Check Question 3.3

orphaned processes will be adopted by whatever process the kernel is using as the "child reaper" as it was called in Linux's early days but no more. For old kernels that was indeed PID=1 (init). (PID=1 is now systemd in recent kernels) For almost anything you would run today, the adopting parent is PID=2, "kthreadd" (kernel thread daemon) which exists for just this purpose. To be a zombie the process must have ceased execution but it won't be adopted until the parent goes to its grave as well.