1 Objective Questions |
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2 ------------------- |
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3 |
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4 .. A mininum of 8 questions here (along with answers) |
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5 |
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6 1. Given the list primes, ``primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, |
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7 29]``, How do you obtain the last 4 primes? |
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8 |
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9 Answer: primes[-4:] |
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10 |
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11 #. Given the list primes, ``primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, |
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12 29]``, What is the output of ``primes[::5]``? |
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13 |
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14 Answer: ``[2, 13]`` |
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15 |
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16 #. Given a list, p, of unknown length, obtain the first 3 (or all, if |
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17 there are fewer) characters of it. |
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18 |
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19 Answer: p[:3] |
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20 |
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21 #. The method ``reverse`` reverses a list in-place. True or False? |
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22 |
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23 Answer: True |
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24 |
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25 #. ``reversed`` function reverses a list in-place. True or False? |
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26 |
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27 Answer: False |
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28 |
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29 #. Given the list ``p = [1, 2, 3]``. p[4] produces an IndexError. True |
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30 or False? |
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31 |
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32 Answer: True |
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33 |
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34 #. Given the list ``p = [1, 2, 3]``. p[:4] produces an IndexError. True |
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35 or False? |
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36 |
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37 Answer: False |
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38 |
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39 #. Given the list primes, ``primes = [2, 3, 5, 7, 11]``, What is the |
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40 output of ``primes[::-1]``? |
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41 |
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42 Answer: [11, 7, 5, 3, 2] |
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43 |
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44 #. Given the list primes, ``primes = [2, 3, 5, 7, 11]``, What is the |
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45 output of ``primes[::-3]``? |
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46 |
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47 Answer: [11, 3] |
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48 |
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49 |
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50 Larger Questions |
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51 ---------------- |
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52 |
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53 .. A minimum of 2 questions here (along with answers) |
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54 |
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55 #. Given a list p. Append it's reverse to itself. |
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56 |
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57 Answer:: |
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58 |
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59 p = p + reversed(p) |
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60 |
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61 |
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62 #. Marks is a list containing the roll numbers of students followed by |
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63 marks. [This is not a recommended way to hold the marks details, |
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64 but the teacher knows only so much Python!] Now she wants to get |
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65 the average of the marks. Help her do it. |
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66 |
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67 Answer:: |
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68 |
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69 marks = [1, 9, 2, 8, 3, 3, 4, 10, 5, 2] |
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70 average = sum(marks[1::2])/len(marks[1::2]) |
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71 |
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72 |
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