This method works for multiple choice answers as well as free form answers as long as alternatives can be classified into a few categories. For our example, let us assume this is a multiple choice test. Let us use the following submissions as an example:
In this notation, it means “Student1” chose ‘A’ for question 1, ‘C’ for question 2 and so on. However, the approach also works if question 1 means “font of the title”, and choice ‘A’ means Times Roman, choice ’B’ means Ariel and etc. Also, note that this method does not rely on the correct answer, at all!