Can matlab grader questions be vulnerable by hackers through pretest?
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Cris LaPierre on 30 Apr 2022
Edited: Cris LaPierre on 30 Apr 2022
If the pretest assessment is a MATLAB Code test type, then learners can expand the test to see the underlying assessment test code.
If that code gives away too much, then consider not making that assessment a pretest. If you are not limiting the number of submissions (default behavior in MATLAB Grader), then there is really no value to making any of the tests pretests anyway.
For an example of how to use pretests, consider looking at the "Calculating voltage using Kirchhoff loops" example problem in the Getting Started with MATLAB Grader problem collection.
I do have some concerns with the code you have shown. Perhaps if you can explain what you are trying to do with this code, perhaps there is an opportunity to modify the problem design.
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Jeff Alderson on 30 Apr 2022
Every time a learner solution is submitted, the solution is recorded and made available to the instructor. Solutions that use obvious attempts at circumventing assessment tests would be very transparent when compared to learner solutions that attempt to solve the problem in good faith. Additionally, the instructor can check for the presence of certain keywords and functions and fail the assessment if they are found. Similarly, the instructor could look for the presence of keywords necessary to solve the problem in the desired way, and fail the assessment if they are not found.
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