by computer engineering I think you mean software engineering, which will probably have relatively high scaling. Maybe close to chemistry, I feel like maximum 100-700 people will do it, let's just say 100-400. The content is difficult and some of the computer languages that will be learnt will be in university comp science classes (what my teacher said, pls don't yell at me) There will be no past papers or anything, meaning if everyone who does software engineering does bad it will be scaled up no matter what. This is because of the possible difficulty, the fact it's a new subject, syllabus, and teachers have only started preparing this year (learning themselves not many have created material/resources.) Since its the first year the subject is running, hopefully the HSC subject won't be that difficult and the scaling will be high