Advanced higher computing Query

Hello, I am a private candidate who is doing SQA advanced higher computing. I just wanted information on if I have to study all 4 aspects of the subjects: software development, computer systems, web design and database design. Or can I just study 3 and is the optional subject is web or database .

You can check the course specification on SQA for future reference.
In fact, you only need to study 2 of the topics. Computer systems has been removed completely, and you can pick one of SDD and WDD.

Hello, are you studying advance higher computing science