This indispensable CGP Workbook is packed with exam-style questions covering every topic on the Grade 9-1 OCR GCSE Computer Science course - fully updated for the specification changes starting in September 2020 and beyond! It tests students on everything from basic definitions to the tricky 8-mark extended answers, and there's plenty of practice at writing code and algorithms too (detailed answers are included at the back of the book). Matching study notes are available in CGP's GCSE Computer Science Revision Guide (9781789085563).