COMP(2041|9044) 22T2 — Week 06 Weekly Test Questions
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COMP(2041|9044) 22T2 — Week 06 Weekly Test Questions
Week 06 Weekly Test Questions
Test Conditions
These questions must be completed under self-administered exam-like conditions. You must time the test yourself and ensure you comply with the conditions below.
You may complete this test in CSE labs or elsewhere using your own machine.
You may complete this test at any time before Week 7 Thursday 18º00º00.
Weekly tests are designed to act like a past paper - to give you an idea of how well you are progressing in the course, and what you need to work on. Many of the questions in weekly tests are from past final exams.
Once the first hour has finished, you must submit all questions you've worked on.
You should then take note of how far you got, which parts you didn't understand.
You may choose then to keep working and submit test question anytime up to Week 7 Thursday 18º00º00 However the maximum mark for any question you submit after the first hour will be 50%
You may access this language documentation while attempting this test:
manual entries, via the man command.
Texinfo pages, via the info command.
Bash documentation via the help command.
Python documentation via the python3 -c 'help()' command.
Any violation of the test conditions will results in a mark of zero for the entire weekly test component.
Set up for the test by creating a new directory called test06 and changing to this directory.
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$ mkdir test06 $ cd test06 |
There are no provided files for this test.
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Test Complete! Your time for this test has finished. You must submit your work now. You should reflect on how you went in this hour, and discuss with your tutor if you have concerns. You may choose to keep working, but the maximum mark for any questions you submit later will be 50%. |
Write a Python program, create_integers_file.py which takes 3 arguments.
The first and second arguments will specify a range of integers.
The third argument will specify a filename.
Your program should create a file of this name containing the specified integers.
For example:
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$ ./create_integers_file.py 40 42 fortytwo.txt $ cat fortytwo.txt 40 41 42 $ ./create_integers_file.py -5 5 a.txt $ cat a.txt -5 -4 -3 -2 -1 0 1 2 3 4 5 $ ./create_integers_file.py 1 1000 a.txt $ wc a.txt 1000 1000 3893 a.txt |
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NOTE: You assume your program is give three valid arguments. Your program can assume its first and second arguments will be integers. Your program can assume its second argument is greater than or equal to its first argument. Your answer must be Python only. You can not use other languages such as Shell, Perl or C. Make the first line of your script #!/usr/bin/env python3 You may not run external programs. For example, you can't run seq . No error checking is necessary. |
When you think your program is working you can autotest to run some simple automated tests:
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$ 2041 autotest python_create_integers_file |
When you are finished working on this exercise you must submit your work by running give:
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$ give cs2041 test06_python_create_integers_file create_integers_file.py |
Write a Python program, nth_line.py which prints the n-th line of a file.
It will be given two arguments n and the file name.
Your program should print nothing if the file does not have an n-th line
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$ seq 42 99 > numbers.txt $ head numbers.txt 42 43 44 45 46 47 48 49 50 51 $ tail numbers.txt 90 91 92 93 94 95 96 97 98 99 $ ./nth_line.py 1 numbers.txt 42 $ ./nth_line.py 20 numbers.txt 61 $ ./nth_line.py 1000 numbers.txt $ echo this file has one line > file.txt $ cat file.txt this file has one line $ ./nth_line.py 1 file.txt this file has one line $ ./nth_line.py 42 file.txt |
2022-07-13