Computer Science 215
                               Quiz 6      Name ______________________

1. In the last class, procedures for reading a file of image data
   into a dynamically allocated area of storage were discussed.
   In this procedure, the proper order in which the required system
   calls should be made is:

   a. fread() should be called to       b. malloc() should be called to
      read the data before malloc()        allocate the storage before
      is called to allocate the            fread() is called to read in
      storage.                             the data.

   c. the program will work correctly
      regardless of the order in which
      fread() and malloc() are called.

2. The number of bytes per pixel that must be read in for an image that
   is encoded as described in class is:

   a. 1 for both the rgb and            b. 3 bytes per pixel for grayscale
      grayscale images in the              1 byte per pixel for rgb
      examples discussed in class

   c. 3 bytes per pixel for both         d. 1 byte per pixel for grayscale
      grayscale and rgb                     and 3 bytes per pixel rgb.

3. The proper expression that should be used to access a pixel at
   position (row, col) in a binary encoded grayscale image is:

   a. *(imageloc + row * numrows + col)  b. *(imageloc + col * numrows + col)

   c. *(imageloc + col * numrows + row)  d. *(imageloc + row * numcols + col)

4. The Floyd-Steinberg algorithm is used to convert

   a. color images to grayscale          b. grayscale images to black/white

   c. color images to black/white        d. black/white images to color

5. The general class to which the Floyd-Steinberg algorithm belongs is:

   a. half-baked                         b. half-toning

   c. half-stoned                        d. half-fast