GCSE Computer Science Data Representation: 240 Questions, Worked Answers (Binary, Hex, AQA-style)

WHAT YOU GET: 240 original GCSE Computer Science data representation questions across 12 skills, in a 26-page printable workbook, with a 6-page answers file showing the working.

Data representation is the most calculation-heavy part of GCSE Computer Science, and it is where marks are easiest to win back with practice. Each skill opens with a method box and a worked example, then 20 questions that build from warm-ups to exam level. Every answer was calculated by script, so the answers file is exact.

WHAT’S INSIDE

• Workbook (26 PDF pages): contents, how-to-use page, progress tracker, then two pages per skill with lined working space and a score box
• Answers (6 PDF pages): every answer, with the calculation shown wherever a method is expected
• Editable Word versions of the workbook and the answers
• Total: 240 questions, 32 PDF pages and 2 Word files

THE 12 SKILLS

1. Binary to denary
2. Denary to binary
3. Hexadecimal and denary
4. Binary and hexadecimal
5. Binary addition and overflow
6. Binary shifts (left and right, with the effect)
7. Units of storage (bits to terabytes)
8. Character encoding (ASCII, Unicode, codes in order)
9. Image file size and colour depth
10. Sound file size (sample rate and resolution)
11. Run-length encoding, encode and decode
12. Mixed exam-style questions, including lossy and lossless compression

HOW TO USE IT

• Cover lesson, homework or revision: one skill takes about 20 minutes
• Students self-mark from the answers file and log scores in the tracker, then retry any skill under 15 out of 20
• Prints cleanly in black and white

ABOUT THE SPECIFICATION
Written in the style of the data representation content in AQA and OCR GCSE Computer Science. Units use 1 KB = 1,000 bytes throughout, with a note on 1 KiB = 1,024 bytes. Questions and data are Study Hack’s own. Please check your specification.

Independent resource, not endorsed by any exam board

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