Joshua Cussen

1.2.4 Data storage

1 min read

Numbers

  • How to convert positive denary whole numbers to binary numbers (up to and inducing 8 bits) and vice versa
  • How to add two binary integers together (up to and including 8 bits) and explain overflow errors which may occur
  • How to convert positive denary whole numbers into 2-digit hexadecimal numbers and vice versa
  • How to convert binary integers to their hexadecimal equivalents and vice versa
  • Binary shifts

Characters

  • The user of binary codes to represent characters
  • The term ‘character set’
  • The relationship between the number of bits per character in a character set and the number of characters which can be represented, e.g.:
    • ASCII
    • Unicode

Images

  • How an image is represented as a series of pixels represented in binary
  • Metadata
  • The effect of colour depth and resolution on:
    • The quality of the image
    • The size of an image file

Sound

  • How sound can be sampled and stored in digital form
  • The effect of sample rate, duration and bit depth on:
    • The playback quality
    • The size of a sound file

Graph view

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