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Fix exam wrong answer in DA0101EN

Question 20 asks what you should do if a model gives R^2 = 1 on train set and R^2 = 0 on validation data. There are 3 options, I tried to answer with 2 submissions and the obviously wrong answer (model works fine on test data so it has no issues) is the only remaining option.

Please fix this as some people could feasibly need this one question to pass the course.

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    Julian shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

    2 comments

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      • Srinivasan V Subramaniam commented  ·   ·  Flag as inappropriate

        Graded Review answer in BD0211EN

        Spark Fundamentals I Cognitive Class BD0211EN
        Introduction to Spark - Part 1

        Review Question 3 (1 point possible)

        Which of the following statements are true of the Resilient Distributed Dataset (RDD)? Select all that apply.

        I selected the following

        RDD is a distributed collection of elements parallelized across the cluster.

        Why is is Wrong ?

      • Julian commented  ·   ·  Flag as inappropriate

        There is nothing wrong with the question, but I suspect the answer is wrong. I no longer have access to the exam but the answers were something a long these lines.
        1. Do nothing, the model works perfectly on the training data
        2. Change model, as it is currently underfitted
        3. Change model as it is currently overfitted
        My first choice was #2, then with my second submission I tried option 3, and both times it was counted as incorrect. Option 1 was the only option left so it would have to be the right answer, however if model performs poorly on a test set, then we can't possibly accept it to be correct.

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