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CS01-01 Computer Science Watch

Why computers use binary

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Next: CS01-02 Denary to binary and back

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In this lesson

In this video you'll learn about why computers use binary for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain the decimal, binary and hexadecimal number bases, and explain why a computer represents all data and instructions in binary.

What it covers

  1. 0:49 Why computers use binary
  2. 2:59 Why two states, not
  3. 5:05 One pattern, three readings
  4. 7:34 The wording

Key words

binarynumber basedenaryrepresent data

For: AQA GCSE 8525, Edexcel GCSE 1CP2, OCR GCSE J277

On the specification

BoardSpecStatement
AQA GCSE 85253.3.1Number bases
Edexcel GCSE 1CP22.1.1Binary
OCR GCSE J2771.2.3Units
For teachers

This GCSE Computer Science lesson teaches why computers use binary. By the end, students should be able to explain the decimal, binary and hexadecimal number bases, and explain why a computer represents all data and instructions in binary. It works through two worked examples and the mistakes examiners report.