--- a/using python modules/questions.rst Wed Nov 17 23:24:57 2010 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,120 +0,0 @@
-Objective Questions
--------------------
-
-.. A mininum of 8 questions here (along with answers)
-
-1. What will be output of the following code snippet,
- ::
-
- from math import sqrt
-
- def sqrt(i):
- return i
-
- print sqrt(49)
-
- a. 7.0
- #. 7
- #. 49
- #. 49.0
- #. Error
-
-Answer: 49
-
-2. What will be the output of the following code snippet,
- ::
-
- import math
-
- def sqrt(i):
- x = math.sqrt(i)
- if int(x) == x:
- return int(x)
- else:
- return x
-
- print math.sqrt(50), sqrt(50), math.sqrt(49), sqrt(49)
-
- a. 7.0710678118654755 7 7 7
- #. 7.0710678118654755 7 7.0 7
- #. 7 7 7 7
- #. 7.0710678118654755 7.0710678118654755 7.0 7
-
-Answer: 7.0710678118654755, 7.0710678118654755, 7.0, 7
-
-3. ``from math import *`` and ``import math`` does the same,
-
- a. True
- #. False
-
-Answer: False
-
-4. Which among these libraries is part of python standard library,
-
- a. Mayavi
- #. scipy
- #. matplotlib
- #. urllib2
-
-Answer: urllib2
-
-5. ``pylab.plot(x,sin(x))`` can be used in a script with ``from pylab
- import *``
-
- a. True
- #. False
-
-Answer: False
-
-6. Which among this is correct,
-
- a. from scipy import plot
- #. from numpy import plot
- #. from matplotlib import plot
- #. from pylab import plot
- #. None of the above
-
-Answer: from pylab import plot
-
-7. Functions ``xlim()`` and ``ylim()`` can be imported to the current
- name-space as,
-
- a. from pylab import xlim, ylim
- #. import pylab
- #. from scipy import xlim, ylim
- #. import scipy
-
-Answer: from pylab import xlim, ylim
-
-8. ``scipy.linspace(-5*scipy.pi, 5*scipy.pi, 500)``
-
- a. creates an array of 500 equally spaced elements from -5*scipy.pi
- to 5*scipy.pi(excluded)
- #. creates an array of 500 equally spaced elements from
- -5*scipy.pi(excluded) to 5*scipy.pi(included)
- #. creates an array of 500 equally spaced elements from -5*scipy.pi
- to 5*scipy.pi, both end points included
- #. created an array of 500 equally spaced elements from -5*scipy.pi
- to 5*scipy.pi, both end points excluded.
- #. None of the above
-
-Answer: creates an array of 500 equally spaced elements from
- -5*scipy.pi to 5*scipy.pi, both end points included
-
-
-Larger Questions
-----------------
-
-.. A minimum of 2 questions here (along with answers)
-
-1. Write a python script to plot a red colour tan plot between -pi to
- pi, with x limits from -pi to pi. Label the figure appropriately
- and with a legend 'tan(x)' and title 'tangent plot'. Label the axes
- x as 'x' and y as 'tan(x)'. Make sure the script can be executed as
- a python script.
-
-2. Write a python script to plot a parabola of the form y^2=4ax with a
- = 0.5(a is the directrix), plot the line in green color add the
- legend as 'y^2=4ax' and title as 'parabola'. For x from -20 to 20
- with 100 equidistant points. Make sure the script can be executed
- as a python script. [`Hint`: Use parametric equations]