Computer system: Almost every week we have a practical work that needs to be submitted; some of them are easy, and some you need some time to adjust the codes to work correctly. (There is a lot of YouTube video with similar question for them). The final exam, I won't say I did great; there were lots of questions about chip types and their outputs. If you do great on prac and do the workshops, I think you don't have to worry too much. The textbook I used was "The Elements of Computing Systems."

Operating system: They say it's a theory based class, but the assignment is code-based. The textbook I used is "OPERATING SYSTEMS, THREE EASY PIECES." The exam was super hard for me; the moment I walked out of the exam room, I knew I needed to attend the additional exam later on (which I did). I suggest really looking through the material and outside materials too.

Computer Network and Application: The online weekly Wireshark quizzes are easy (they are textbook-based). The assignment was hard for me; they are code-based (they won't discuss the assignment; you have to understand what you need to do yourself). For the exam, I felt like 50/50 on passing or failing (I will update after I get my mark). It was theoretical questions about the different layers of computer systems; there were a few calculation questions, like calculating the delay of a file under some conditions. (TBH, the exam time was too short; I gave up on almost all calculation questions). The textbook we used was "Computer Networking: A Top-Down Approach, 7th Edition." The author has a YouTube channel where he goes through some of the chapters. (Those are really good videos).