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5 Written questions

5 Matching questions

  1. vector graphic
  2. ASCII
  3. two's complement (8 bit)
  4. vector disadvantage
  5. lossy compression
  1. a some resolution data is lost, image quality affected
  2. b limited types of image possible, drawings only
  3. c image stored as collection of shapes, each represented by set of numbers defining properties such as coordinates, line thickness, fill colour, layer level
  4. d represents negative and positive numbers in the range -128 to +127
  5. e 7 bit code representing (only) latin type alphabets and language symbols

5 Multiple choice questions

  1. graphic file size made smaller by using special algorithms to reduce amount of data needed for bitmap
  2. 16 bit code to represent characters from all the world's alphabets and symbols
  3. 256 possible colours
  4. image can scale to any size without increasing file size, shapes are fully editable by amending numbers that represent attributes eg change layer
  5. photos, images that can't easily be represented as shapes

5 True/False questions

  1. unicode disadvantageeach character needs more bits (twice)


  2. lossless compressionno resolution information is lost


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


  4. 32 bit integer64 thousand colours


  5. precisionaccuracy of a floating point value depends on number of bits for mantissa (significant digits)