This is a written test about how data is represented in a computer system. It includes questions on binary, denary, hexadecimal, binary addition, logic gates, truth tables, ASCII, bitmaps and vector images and machine code. Suitable for KS3 and GCSE. A useful revision tool to help pupils recognise gaps in their knowledge. Written in authentic English for the UK education market. For more resources visit www.nicholawilkin.com.