He will ask common questions about engine and car care. Look for “show me” and “tell me” questions online, or ask ur instructor to provide you will a copy. It’s wise to book some lessons with an instrutor even if you are privately learning or already know how to drive, since he will drive thru the test routes.
As for reverse parking, not necessarily. It depends upon the parking spaces available at the test centre.
PS: check this site for more help.