AQA Computer Science GCSE
This part of the course is all about understanding how computers use binary numbers to store information and instructions. This includes text, images and sound as well as instructions in programs and more complex data such as video files.
There are five main parts of the syallabus here:
- Binary numbers
- Characters, words and text
- Images – pictures and photographs
- Sound files
- Data compression
None of this is too hard in itself, although some of the binary and hexadecimal is a bit tricky. But it's stuff that you have to actually learn and practice doing to be confident with in an exam.
How computers work
Before you start, it's useful to know how computers work and why they have to use binary numbers for everything.
What do computers do? – slides from class
So, how do computers actually deal with numbers?