GCSE Computer Science: Data Representation

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Across
  1. 2. Standard way of representing text.
  2. 4. The number of dots that make up an image.
  3. 7. Operation used to multipy or divide a binary number by powers of 2. (2 words)
  4. 12. A technique to represent binary data in a shorter form, saving storage space.
  5. 14. The capacity of RAM is usually measured in this unit.
  6. 17. A method of representing binary negatives that has problems with minus 0. (3 words)
  7. 18. Modern way of representing text, using 2 or more bytes.
  8. 19. A number system consisting of 1s and 0s.
  9. 23. A form of compression where no data is discarded.
  10. 24. The smallest piece of data in a computer system.
Down
  1. 1. The smallest element of an image.
  2. 3. The amount of data each pixel uses to represent colour information. (3 words)
  3. 5. How often we take a measurement (e.g. of a sound). (2 words)
  4. 6. Occurs when the result of a calculation is too large to fit in the available bits.
  5. 8. Harddisk capacity is often measured in this unit.
  6. 9. The preferred way to represent binary negatives. (2 words)
  7. 10. A technique where each letter in a string is shifted along the alphabet, to hide the meaning of the text. (2 words)
  8. 11. 1024 bytes.
  9. 13. Scrambling data to prevent it being understood by unauthorised users.
  10. 15. Another name for hexadecimal. (2 words)
  11. 16. Number system using 0-9 and A-F.
  12. 19. 8 bits.
  13. 20. Half a byte.
  14. 21. Another name for binary. (2 words)
  15. 22. A form of compression where data is discarded in order to significantly reduce file size.