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Flashcards

Data representation

Tom Mellor Computing GCSE Inglês 33 flashcards

Flashcards do conjunto (33)

  1. 1What is the Base-2 number system known as?Binary
  2. 2What digits can be used in the binary number system?0s and 1s
  3. 3What is the binary value 00000011 in denary?3
  4. 4What is the binary value 00000000 in denary?0
  5. 5What is the Base-10 number system known as?Denary
  6. 6How many bits are there in a byte?8
  7. 7How many bytes are there in a kilobyte?1024
  8. 8How many bits are there in a nibble?4
  9. 9What name is given to the unit of data larger than a kilobyte?Megabyte
  10. 10What does 1024 gigabytes equal?1 terabyte
  11. 11What is the binary value 01101011 in denary?107
  12. 12What are these added in binary? 10101011 + 110011010101111000
  13. 13What is the denary value 100 in binary?01100100
  14. 14What is the result of this in denary? 10010101 - 0100101174
  15. 15What is the Base-16 number system known as?Hexadecimal
  16. 16What does 'overflow' mean?When a number is too large to fit into the allocated number of bits. Some bits are lost, leaving an incorrect value.
  17. 17What is the denary value 10 in hexadecimal?A
  18. 18What is the hexadecimal value E in denary?14
  19. 19What is the binary value 1110 in hexadecimal?E
  20. 20What is the hexadecimal value 3D in binary?00111101
  21. 21What is a character set?The characters available to a computer too use
  22. 22How many bits does ASCII use for each character?7
  23. 23What does ASCII stand for?American Standard Code for Information Interchange
  24. 24How many character possibilities does Unicode allow for?More than 4 billion possibilities
  25. 25What is colour depth/bit depth?The number of bits used for each pixel. More bits mean more colours can be represented.
  26. 26What is resolution?The number of pixels per unit, eg. ppi (pixels per inch)
  27. 27What is metadata?Information about the image data which allows the computer to recreate the image from binary data in the file. It must comtain height and width (in pixels) and the colour depth in bpp (bits per pixel)
  28. 28What is the term for sound that continuously varies?Analogue
  29. 29How is analogue sound converted into digital sound?The sound wave is sampled at set intervals and the values are recorded.
  30. 30What is meant by 'sample rate'?The number of times the sound is sampled per second.
  31. 31What is sample rate measured in?Hz (Hertz), eg. 50Hz = 50 samples taken per second
  32. 32What is meant by 'bit rate'?The space available for each second, measured in kilobits per second (kbits/s).
    For example, 128kbits/s is 128 kilobits per second of sampled sound.
  33. 33What two parts is an instruction decoded into?Operator and operand

Informações

Descrição
Flashcards for OCR Computing, section 4 (representation of data in computer systems)
Criado por
Tom Mellor
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0
Histórico
  • Criado por lilymate · 11 out 2014
  • Copiado por Tom Mellor · 16 nov 2016
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