Computer Science 101
                                Quiz B      Name ______________________

1. The correct way to access a grayscale pixel in the out_image is:

   a.  out_image[3 * row * numcols + col]

   b.  out_image[row * numcols + col]
b
   c.  out_image[col * numrows + row]

   d.  out_image[3 * row * numcols + 3 * col]


2. Suppose ndx represents an offset in a grayscale image, the proper
   way to compute the row and column indicies of the corresponding
   pixel is:

   a.  row = numrows / ndx;          b. row = numrows / ndx;
d      col = numcols / ndx;             col = numcols % ndx;

   c.  row = numrows / ndx;          d. row = numcols / ndx;
       col = numcols / ndx;             col = numcols % ndx;


3. Identify the expression whose value is the remainder when 343 is
   divided by 141


   a. 141 % 343                      b. 143 / 343
d
   c. 343 / 141                      d. 343 % 141


4. The minimum and maximum values pix may be assigned by this expression
         pix = 28 + (r + c) % 200;
   are:

    a. 0    200                      b. 28   200
d
    c. 28   228                      d. 28   227


5. Consider the problem of counting the number of instances of values
   between 0 and 9 in an input file.  Which is the proper way to do this.

  a. num = fscanf(stdin, "%d", &ndx);    b. num = fscanf(stdin, "%d", &ndx);
     while (num == 1)                       while (num == 1)
     {                                      {
        ctrs[ndx] = ctrs[ndx] + 1;             ctrs[ndx] = ctrs[ndx] + ndx;
        num = fscanf(stdin,"%d",&ndx);         num = fscanf(stdin,"%d",&ndx);
a    }                                      }

  c. num = fscanf(stdin, "%d", &ndx);    d. num = fscanf(stdin, "%d", &ndx);
     while (num == 1)                       while (num == 1)
     {                                      {
        ctrs[ndx] = ndx + 1;                   ctrs[ndx] = ndx;
        num = fscanf(stdin,"%d",&ndx);         num = fscanf(stdin,"%d",&ndx);
     }                                      }