maybe the question is impossible to get an answer.
Does the exam grader judge the code or just the last uploaded models?
Because I am pro-user of colab, I think I can use it to complete the exam fully, however, I really not sure, must I copy back the code to IDE(exam environment)?
Maybe @Jocelyn_Becker or @Laurence_Moroney might be able to shine some light here
The grader uses your model by running test data through it to see how it performs.
Please refer to the exam handbook for everything else: https://www.tensorflow.org/extras/cert/TF_Certificate_Candidate_Handbook.pdf