yeah sdd has similar syllabus to software engineering - not 1-1 but many of the same topics. i'd say that things have been added more than they have been removed - from memory, software engineering keeps what was at the core of sdd, then adds on a bunch of new topics like machine learning, python in final exams, mechatronics, security etc, also the optional topics have been merged. so i'd recommend doing a bunch of the newer sdd past papers (the older ones, while in the same syllabus, kind of ask questions in a different way and i would say aren't as relevant as the newer ones to software engineering), additionally closer to the hsc next year, nesa will likely put out a set of sample questions so you'll know what the hsc exam will roughly be like (this is what they did when they updated the science syllabus). for now, just grind out textbook q's, past papers and whatever your teacher gives you, from a brief look the only year 11 topic that wasn't covered by the old sdd syllabus was programming mechatronics (and oop was covered in the optional section). and of course coding websites like codewars can also help for giving you new programming problems
. this was was probably because there was no actual textbook/resources around and my teacher said to not bother looking at the SDD past papers/resources.
