Examine Apache configuration locations on server

-root@centos-server ~]# which httpd
/usr/sbin/httpd


[root@centos-server ~]# /usr/sbin/httpd -V | egrep ROOT\|SERVER_CONFIG
-D HTTPD_ROOT="/etc/httpd"
-D SERVER_CONFIG_FILE="conf/httpd.conf"


[root@centos-server ~]# grep  "^[iI]nclude" /etc/httpd/conf/httpd.conf
Include conf.d/*.conf

[root@centos-server ~]# ls -la /etc/httpd/conf.d/
total 16
drwxr-xr-x. 2 root root 4096 Aug 14 21:06 .
drwxr-xr-x. 4 root root 4096 Aug 14 21:06 ..
-rw-r--r--. 1 root root  392 Jul 23 14:18 README
-rw-r--r--. 1 root root  299 Jul 18 06:27 welcome.conf
...... here will be your other confs that are included

[root@centos-server ~]#  less /etc/httpd/conf.d/welcome.conf 

# 

# This configuration file enables the default "Welcome"

# page if there is no default index page present for

# the root URL.  To disable the Welcome page, comment

# out all the lines below.

#

<LocationMatch "^/+$">

    Options -Indexes

    ErrorDocument 403 /error/noindex.html

</LocationMatch>