I took an OO class once where the questions were verbatim for about 3 semesters prior, except for a simple find replace on the variable names in the code snippe

I took an OO class once where the questions were verbatim for about 3 semesters prior, except for a simple find replace on the variable names in the code snippets. e.g. x = y became var1 = var2 Needless to say after I recognised the pattern from the first exam I got perfect scores for the rest of the semester.