GCSE Computer Science

Data representation and security
revision.

Binary, images, sound, and the threats that turn data into an incident.

Data representation and security guides

Pick the text.
Build the argument.

01

Binary and data representation

From bits and overflow to hex, characters, images, sound and why compression has to throw information away — or not.

Start revising 02

Cyber security

How systems are actually attacked — malware, people and weak configuration — and the controls that make an attack expensive.

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Keep going

More GCSE Computer Science
in the same style.

GCSE Computer Science revision for algorithms, programming, binary, networks, cyber security, systems architecture and Boolean logic — with trace tables, not hand-waving.

All Computer Science revision