yea fair enough algos/logic are very important in developing software but just like HSC physics it's more so u can just understand the concepts like for example current is inversely proportional to resistance and things like that.
also one of your mates is probably struggling because programming is another way of thinking. you can't just start writing #include stdio.h main void and expect things to work. you have to work out the program logic then what steps you need to get there like if statements, functions, external...
stick with this if you're happy with it
plus other subjects you mean english or you plan to do more than 10U for the HSC (in which case that is a terrible idea)
nope unless if you had an interest in those
SDD does not help much, if at all. If you have an interest in pursuing engineering you should be aiming to do extension 2 math (ext 1 at least) as well as physics if you really wanted to. the other 2 subjects you pick can be whatever as no other HSC course will prep you for uni
not sure what ur asking
but all branches of engineering are somewhat related in one way or another
for example, I have a degree in mechatronics engineering but at work I do a bit of design work (mechanical?) and designing PCBs (electrical) as well as bit of research on materials/manufacturing...
those are 2U subjects with the exception of ext history of which are 1U
your atar are the best 8 units inclusive of 2U of english
so say legal studies was ur lowest mark they would take 1U of legal studies and 1U of ext history