Nothing - the execute permission cannot be assigned to a directory.

The export permission on a directory means that directory can be mounted by a remote server.

The exclude permission on a directory means that the directory will not be displayed by the Is command.

The execute permission on a directory means you can use the cd command to change into the directory.

The exclude permission on a directory means that the files in the directory are hidden.

The examine permission on a directory means that you can see the directory's contents.