It IS part of the book. The page where you're supposed to fill the blanks with the current information such as current PM/provincial PM/Governor General is not optional and you can be quizzed over it... It's just not filled by default for obvious reasons.
Obviously, no one expects location specific questions such as the current MP of a person, since people from different electoral ridings have the same test at the same place, but the ones that are Canada or province wide may appear on a test.
Granted, apart from maybe the name of the lieutenant-governor, those are the easiest questions someone can get...