Preview lessons, content and tests

Computer Science & Programming solved. All in one platform.

1. To trial the platform and take tests, please take a few seconds to SIGN UP and SET UP FREE.
2. Searching for something specific? See our text overview of all tests. Scroll right for levels, and lists.

Join 36000+ teachers and students using TTIO.

The CPU - Central Processing Unit

The CPU, often called the "brain of the computer", is responsible for processing program instructions. Modern chips have come a long way  - check out some of the history of microprocessors here (Tom's Hardware history) or here (Computer Nostalgia) if you're interested. Today, a typical intel processor will contain over a billion transistors!


In this unit and series of tests you will be assessing your knowledge of the CPU.

You may find the following links helpful for further study and revision. Scroll down for videos and teaching/learning presentations.

Suggested Video on the ARM processor

Intro Video - How the CPU works (basics)

Processor: PowerPoint loading ...

PowerPoint: Von Neumann Architecture

Additional PowerPoint resources:


1. Can you think of any other processors (other than INTEL?)

2. Could there have been an alternative to the CPU (as the brain of a computer). What could it have been? (this is a difficult question!)

Further Reading - Online Museum (CPU History):