Which of the following is the main Apache configuration file? A. httpd.conf B. apache.con C. /etc/profile D. system.ini E. None of the above

The correct answer is A. httpd.conf.

httpd.conf is the main Apache configuration file. It contains all the directives that control how Apache will run. These directives can be used to configure everything from the location of the web root directory to the maximum number of connections that Apache will accept.

B. apache.con is not a valid file name.

C. /etc/profile is a shell configuration file. It is used to set environment variables and other shell options.

D. system.ini is a Windows configuration file. It is used to configure various Windows settings, such as the desktop background and the default font.

E. None of the above is the correct answer.