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5 Written questions

5 Matching questions

  1. lossy compression
  2. 32 bit integer
  3. precision
  4. 24 bit color
  5. lossless compression
  1. a accuracy of a floating point value depends on number of bits for mantissa (significant digits)
  2. b Digital 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. c no resolution information is lost
  4. d 4 bytes with binary place values 2^0 to 2^31, maximum value (2^32)-1
  5. e some resolution data is lost, image quality affected

5 Multiple choice questions

  1. graphic file size made smaller by using special algorithms to reduce amount of data needed for bitmap
  2. 64 thousand colours
  3. number of bits used to code a colour, aka colour depth
  4. limited types of image possible, drawings only
  5. photos, images that can't easily be represented as shapes

5 True/False questions

  1. 8 bit color256 possible colours

          

  2. rangelimit for smallest value (near zero) and largest value on number line depends on number of bits for exponent (moves the point)

          

  3. bit map disadvantageresolution dependant (zooming will show pixels), large file size for high resolution / high colour depth, limited editing - pixel operations only

          

  4. vector graphicimage stored as collection of shapes, each represented by set of numbers defining properties such as coordinates, line thickness, fill colour, layer level

          

  5. ASCIIlimit for smallest value (near zero) and largest value on number line depends on number of bits for exponent (moves the point)

          

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