Basic 11
Now based on the description of the level, this level is running Apache. Let’s look at the request.

Okay, so the server has a collection it seems. Also, the song is an Elton song. If the server has a collection, it might have an organization system, most likely alphabetical. Let’s see if we can access “e” sub-directory.

So directory listing is enabled. let’s see if we can find out more. Following the directory listing to the bottom, we get to e/l/t/o/n subdirectory.

Let’s see if we can move further from here. Given that it is using apache, let’s see if we can access .htaccess file.

So there is a DaAnswer directory.

This is a nice wordplay! The answer is “not what you think”. You can enter it index.php in the root directory for Basic 11 i.e. https://www.hackthissite.org/missions/basic/11/index.php