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5 Written questions

5 Matching questions

  1. 16 bit color
  2. precision
  3. Unicode
  4. two's complement (8 bit)
  5. 8 bit color
  1. a 16 bit code to represent characters from all the world's alphabets and symbols
  2. b represents negative and positive numbers in the range -128 to +127
  3. c accuracy of a floating point value depends on number of bits for mantissa (significant digits)
  4. d 256 possible colours
  5. e 64 thousand colours

5 Multiple choice questions

  1. 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.
  2. limited types of image possible, drawings only
  3. image can scale to any size without increasing file size, shapes are fully editable by amending numbers that represent attributes eg change layer
  4. no resolution information is lost
  5. bitmap file size depends on the resolution and the bit depth for pixel colour; (length in pixels) x (breadth in pixels) x (bit depth)

5 True/False questions

  1. unicode disadvantagelimited types of image possible, drawings only


  2. 32 bit integer4 bytes with binary place values 2^0 to 2^31, maximum value (2^32)-1


  3. bit mapnumber of bits used to code a colour, aka colour depth


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


  5. lossy compressionsome resolution data is lost, image quality affected