‹ GCSE Computer Science
Data representation
Binary, denary and hexadecimal, binary addition and shifts, two's complement, and how characters, images and sound are stored and compressed.
Start: Binary, denary and hexadecimal About 25 min, free
Lessons
Practise and test
By the end you can
Convert between binary, denary and hexadecimal Add binary numbers, spot overflow and carry out shifts Use two's complement for negative numbers Calculate the size of text, image and sound files Use run length encoding and Huffman codes Revision notes
Specifications AQA 8525 3.3.1 to 3.3.8OCR J277 1.2.3 and 1.2.4 (units, numbers, characters, images, sound, compression)Pearson Edexcel 1CP2 Topic 2
Next unit: Computer systems Previous unit: Databases and SQL
AQA, Pearson Edexcel and OCR are registered trade marks of their owners. Brainlag Learn is independent: it is not affiliated with or endorsed by any exam board, and every question on it is original.
