Fortunately No
Just know what XSL-Fo is and some of teh main elemnts in it
Most of teh questions need you to know a understanding of teh technology not its SYNTAX !! It is also very important to know teh technologies related to XSL-Fo and opposite technologies lile CSS!!!
Most of teh questions will be related to the differences between CSS and XSL-FO ..
you should be able to say y something cant be done with CSS but with XSL-FO or vice versa ..or the advantages of one technology over the another !!
For example ..if u use XSL_FO , u dont need a seprte parser for that, as it is based on XML
But if u use CSS with XML, u wil need 2 parsers - one for CSS and one for XSL-FO !!1
hope this helps !!!