The document root directory is /var/www/html and it's defined in /etc/httpd/conf/httpd.conf.
This isn't really the right forum for asking questions about Apache, though. Apache Tomcat isn't the same thing as Apache httpd. It's confusing, since we generally say "Tomcat" for Apache Tomcat, but "Apache" for Apache httpd.
Customer surveys are for companies who didn't pay proper attention to begin with.