Computer revision Crossword

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Across
  1. 4. when software takes a copy of files to protect against data loss and malware attacks.
  2. 9. an optical device that is easily damaged, cheap and accesses data slowly
  3. 11. A type of system software ex. Microsoft
  4. 12. when an algorithm is used to scramble plain text into cipher text.
  5. 14. a collection of wires that transmit data and instructions from one component to another
  6. 16. decodes instructions and sends signals to control how data moves around the CPU.
  7. 18. a general term covering computer programs
  8. 19. any information about a living individual that allows that individual to be identified
  9. 23. Is the part of the CPU which performs calculations
  10. 24. it is read-only
  11. 25. this can be calculated by doing Width x height x colour depth + 10% for metadata
  12. 26. memory a solid-state device that has limited numbers of read/write cycles
Down
  1. 1. part of the hard disk being used as memory
  2. 2. software that provides a platform on which users can run programs and maintain the computer system
  3. 3. cycles per second
  4. 5. all physical parts of a computer system
  5. 6. the person the stored data refers to
  6. 7. when software reduces the size of a file so it takes up less disk space and is quicker to download over the internet.
  7. 8. computer systems with a dedicated function within a larger mechanical or electrical system
  8. 10. 00111000 in denary
  9. 13. 11001100 in denary
  10. 15. the unit before petabyte
  11. 17. a defined list of characters recognised by computer hardware and software.
  12. 20. a small amount of memory in the CPU
  13. 21. when data is stored using pits and lands
  14. 22. the unit after megabyte