Objective Questions
-------------------

 1. which default argument, when used with ``@interact`` gives a slider 
    starting at 0 and ending in 10

   a. (0..11)
   #. range(0, 11)
   #. [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
   #. (0..10)

   Answer: (0..10)

 2. What is the input widget resulted by using ``n = [2, 4, 5, 9]`` in the
    default arguments along with ``@interact``

   a. input field
   #. set of buttons
   #. slider
   #. None

   Answer: set of buttons

 3. what is the type of ``n`` in the following function::

        @interact
        def f(n=2.5):
            # do something with n

   a. int
   #. float
   #. string
   #. complex

   Answer: float