AQA Computer Science GCSE
Data Representation – Binary Bits and Bytes
You need to know about how binary digits form Bytes, kiloBytes, MegaBytes and so on. And nibbles.
Binary Numbers – bits and bytes – lots of important terminology here
Converting between Units of Information
By Units of Information, I mean kiloBytes, MegaBytes, GigaBytes, TerraBytes and so on.
You need to be able to convert between these – so change 8 GB into kiloBytes or 48,000 bits in MegaBytes. The maths of this isn't too hard, but it's tricky to get your head around exactly how to do this.
Converting between Units of Information – how to convert
Questions to try:
Units of Information questions – in exam style
Try using the table first to work out how to convert from larger to smaller units. Then you can use the worked examples to figure out how to convert both ways. Then there are some questions to try.
Units of Information table – works on converting from larger to small units (e.g. GB to kB)
Units of Information worked examples – examples showing (I hope) how to convert from larger to smaller and smaller to larger units
Revision Summary
The key slides:
How to Convert – summary