Computer Science 215
                               Quiz O      Name ______________________

1. In the C++ design presented in class:

   a. obj_t was a base class and       b. obj_t was a base class and
      sphere_t was a derived class        sphere_t was a derived class

   c. both classes were unrelated
      peer classes

2. A derived class should be:

   a. a generalization of the base     b. bear no relationship to the
      class                               the base class

   c. a specialization of the base
      class

3. Suppose a tiled plane class, tplane_t, is a derived from class plane_t
   which is in turn derived from classes obj_t and material_t.  The
   correct way to express this relationship is:

   a. class tplane_t: public obj_t, public material_t

   b. class tplane_t: public plane_t

   c. class tplane_t: public obj_t, public material_t, public plane_t


4. The tplane_t constructor begins as follows

   tplane_t::tplane_t(
   FILE *in,
   FILE *out,
   int  otype,
   int  oid) : plane_t(in, out, otype, oid)

   if the  : plane_t(in, out, otype, oid) text is deleted

   a. the plane_t constructor will no      b. there will be no difference at
      longer be called when a tplane_t        all in the behavior of the
      is created                              program

   c. a plane_t constructor will be called
      but it will be the default constructor
      instead of the one with 4 parameters


5. Suppose the tplane_t::dump_obj() function contains the following code:

   void tplane_t::dump_obj(
   FILE *out)
   {
      plane_t::dump_obj(out);

   a. The plane_t:: prefix in the           b. the plane_t:: prefix is serves
      line shown will create a                 only to document whats going on.
      syntax error                             Removing it will have no effect
                                               on program behavior

   c. Removing the plane_t:: prefix
      will cause an infinite recursion
      loop