When a parent process is killed by “kill -9”, will subprocess also be killed?

Question

One of my colleague told me this morning, when he killed supervisord by \"kill -9\", the subprocesses of supervisord is not killed.

He is quite sure about that, but I

Answer 1

You just need to know which process or service you wanna kill. In my case httpd is.

killall -9 httpd

It will kill all the child processes of httpd.