diff -r 88a01948450d -r d33698326409 manipulating-lists/questions.rst --- a/manipulating-lists/questions.rst Wed Nov 17 23:24:57 2010 +0530 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,72 +0,0 @@ -Objective Questions -------------------- - -.. A mininum of 8 questions here (along with answers) - -1. Given the list primes, ``primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, - 29]``, How do you obtain the last 4 primes? - - Answer: primes[-4:] - -#. Given the list primes, ``primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, - 29]``, What is the output of ``primes[::5]``? - - Answer: ``[2, 13]`` - -#. Given a list, p, of unknown length, obtain the first 3 (or all, if - there are fewer) characters of it. - - Answer: p[:3] - -#. The method ``reverse`` reverses a list in-place. True or False? - - Answer: True - -#. ``reversed`` function reverses a list in-place. True or False? - - Answer: False - -#. Given the list ``p = [1, 2, 3]``. p[4] produces an IndexError. True - or False? - - Answer: True - -#. Given the list ``p = [1, 2, 3]``. p[:4] produces an IndexError. True - or False? - - Answer: False - -#. Given the list primes, ``primes = [2, 3, 5, 7, 11]``, What is the - output of ``primes[::-1]``? - - Answer: [11, 7, 5, 3, 2] - -#. Given the list primes, ``primes = [2, 3, 5, 7, 11]``, What is the - output of ``primes[::-3]``? - - Answer: [11, 3] - - -Larger Questions ----------------- - -.. A minimum of 2 questions here (along with answers) - -#. Given a list p. Append it's reverse to itself. - - Answer:: - - p = p + reversed(p) - - -#. Marks is a list containing the roll numbers of students followed by - marks. [This is not a recommended way to hold the marks details, - but the teacher knows only so much Python!] Now she wants to get - the average of the marks. Help her do it. - - Answer:: - - marks = [1, 9, 2, 8, 3, 3, 4, 10, 5, 2] - average = sum(marks[1::2])/len(marks[1::2]) - -