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5 Written questions

5 Matching questions

  1. lossy compression
  2. 16 bit color
  3. 8 bit color
  4. 32 bit integer
  5. bit map advantage
  1. a 256 possible colours
  2. b 64 thousand colours
  3. c some resolution data is lost, image quality affected
  4. d photos, images that can't easily be represented as shapes
  5. e 4 bytes with binary place values 2^0 to 2^31, maximum value (2^32)-1

5 Multiple choice questions

  1. number of bits used to code a colour, aka colour depth
  2. bitmap file size depends on the resolution and the bit depth for pixel colour; (length in pixels) x (breadth in pixels) x (bit depth)
  3. resolution dependant (zooming will show pixels), large file size for high resolution / high colour depth, limited editing - pixel operations only
  4. 7 bit code representing (only) latin type alphabets and language symbols
  5. accuracy of a floating point value depends on number of bits for mantissa (significant digits)

5 True/False questions

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

          

  2. vector disadvantageimage can scale to any size without increasing file size, shapes are fully editable by amending numbers that represent attributes eg change layer

          

  3. lossless compressionsome resolution data is lost, image quality affected

          

  4. two's complement (8 bit)no resolution information is lost

          

  5. rangelimit 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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