Teachers should have a good understanding of all the texts, especially if they're marking the HSC. the only reason they wouldn't, is if they were young and/or inexperienced, but they wouldn't have noobs marking the HSC would they? i have faith in the board of studies.
http://news.boardofstudies.nsw.edu.au/index.cfm/2011/10/17/Written-English-HSC-exams-start-tomorrow
"Tuesday's two-hour paper for English Standard and Advanced has three parts: short answer questions about an unseen text, a composition on or adaption of a studied text, and an essay based on the...