I don't think he knows what he's talking about... Apache isn't an "application" in the traditional sense.
I believe Apple has traditionally installed 1.3, but to check fire up the server from System Preferences. Then navigate to a made up page. It'll give a 404 and it should tell you what version of Apache you're running.
Try using this address:
http://localhost/thisistotallymadeupanddoesntexist.html
I gives me "Apache/1.3.33 Server at kelly.local Port 80"
For an example, see my server running Apache 2:
http://armin.sytes.net/blah.html
cheers