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5 Written Questions

5 Matching Questions

  1. image file size
  2. lossy compression
  3. bit depth
  4. data compression
  5. 32 bit integer
  1. a bitmap file size depends on the resolution and the bit depth for pixel colour; (length in pixels) x (breadth in pixels) x (bit depth)
  2. b graphic file size made smaller by using special algorithms to reduce amount of data needed for bitmap
  3. c 4 bytes with binary place values 2^0 to 2^31, maximum value (2^32)-1
  4. d number of bits used to code a colour, aka colour depth
  5. e some resolution data is lost, image quality affected

5 Multiple Choice Questions

  1. no resolution information is lost
  2. binary values corresponding to grid of pixels including colour code
  3. represents negative and positive numbers in the range -128 to +127
  4. 16 bit code to represent characters from all the world's alphabets and symbols
  5. 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.

5 True/False Questions

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

          

  2. 16 bit color256 possible colours

          

  3. vector advantagelimited types of image possible, drawings only

          

  4. 8 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.

          

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

          

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