OCR GCSE Computer Science J277 Data Representation 125 Questions, Worked Examples & Mark Schemes

Master Data Representation for OCR GCSE Computer Science J277 with this comprehensive revision and exam practice resource from Silicon Scholar.

Featuring 125 exam-style questions, worked examples and mark schemes, this resource helps students develop a deeper understanding of how computers represent, store and process data.

What’s included:

• 125 structured exam-style questions.
• Worked examples with clear explanations.
• Detailed mark schemes for checking answers.
• Binary and denary conversions.
• Binary addition and shifts.
• Hexadecimal and binary representation.
• Character encoding: ASCII and Unicode.
• Images, pixels, resolution and colour depth.
• Sound representation, sampling and bit depth.
• Data storage units and file size calculations.
• Compression: lossy and lossless.

Skills students will develop:

• Apply data representation principles accurately.
• Complete numerical conversions confidently.
• Solve binary arithmetic problems.
• Calculate image and sound file sizes.
• Explain encoding and compression techniques.
• Answer examination questions using appropriate terminology.
• Improve accuracy and confidence in written responses.

Ideal for:

• OCR GCSE Computer Science J277 students.
• Teachers planning classroom assessments.
• Tutors delivering targeted revision.
• Independent study and exam preparation.

Why Silicon Scholar?

We create structured, challenging and examination-focused Computer Science resources that turn difficult concepts into manageable learning experiences.

Understand the data. Master the calculations. Maximise your potential.

Silicon Scholar – Empowering Computer Science Success.