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Data representation stk-cH Test

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5 Written Questions

5 Matching Questions

  1. precision
  2. two's complement (8 bit)
  3. vector advantage
  4. vector graphic
  5. lossless compression
  1. a image stored as collection of shapes, each represented by set of numbers defining properties such as coordinates, line thickness, fill colour, layer level
  2. b no resolution information is lost
  3. c accuracy of a floating point value depends on number of bits for mantissa (significant digits)
  4. d represents negative and positive numbers in the range -128 to +127
  5. e image can scale to any size without increasing file size, shapes are fully editable by amending numbers that represent attributes eg change layer

5 Multiple Choice Questions

  1. photos, images that can't easily be represented as shapes
  2. 7 bit code representing (only) latin type alphabets and language symbols
  3. bitmap file size depends on the resolution and the bit depth for pixel colour; (length in pixels) x (breadth in pixels) x (bit depth)
  4. some resolution data is lost, image quality affected
  5. number of bits used to code a colour, aka colour depth

5 True/False Questions

  1. bit map disadvantagephotos, images that can't easily be represented as shapes

          

  2. 16 bit colorDigital color model that uses eight bits each for the three additive colors (red, green, blue.) It can reproduce 256 shades of each primary color. Total 16 million shades. True colour.

          

  3. 8 bit color256 possible colours

          

  4. Unicode16 bit code to represent characters from all the world's alphabets and symbols

          

  5. range7 bit code representing (only) latin type alphabets and language symbols

          

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