Will killing a parent process kill the child processes?

When parent process is sent SIGTERM signal, the parent process will execute it's own signal handlers to terminate it's child processes.

In the below case, sending SIGTERM to parent process ID 2086, kills all the child process too

# ps -eHf | grep http
root      2086     1  0 07:11 ?        00:00:00   /usr/sbin/httpd
apache    2088  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2089  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2090  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2091  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2092  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2093  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2094  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd
apache    2095  2086  0 07:11 ?        00:00:00     /usr/sbin/httpd

# kill 2086

# ps -eHf | grep http
root      2128  1932  0 07:12 pts/0    00:00:00         grep http

However, sending the parent process -9 signal (SIGKILL), will not allow to execute it's signal handlers. So parent process will not be able to send termination signal to it's child processes. So only parent process will get killed and child processes will live.

# ps -eHf | grep http
root      2157  1932  0 07:12 pts/0    00:00:00         grep http
root      2144     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2146  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2147  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2148  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2149  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2150  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2151  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2152  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd
apache    2153  2144  0 07:12 ?        00:00:00     /usr/sbin/httpd

# kill -9 2144

# ps -eHf | grep http
root      2190  1932  0 07:13 pts/0    00:00:00         grep http
apache    2146     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2147     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2148     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2149     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2150     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2151     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2152     1  0 07:12 ?        00:00:00   /usr/sbin/httpd
apache    2153     1  0 07:12 ?        00:00:00   /usr/sbin/httpd