I thought that it will be huge achievement to get diploma from well ranked university. However, at the end of my studies, as a foreign student I realized that the questions in exams I passed were repeating from past exams. Those past exams were not available in the database, but finding the screenshots from many students led me to believe that many exams are not credential. I'm afraid that this information will diminish the achievement I did by obtaining diploma from this university and hinder the opportunities for finding the job in the market if this information is publicised. I thought to raise this question with the Ethics committee but afraid that it will be David contra Goliath knowing that this practice is accepted as general for so many years. There are so few reusable exam question that actually the same exams are repeating every second year. There is no systematical way offered by the university to access the old exam. So the students communicate them via screenshots.
There is wonderful answer by @ Dan Romik below, how it is possible that he understood the question and you put on hold as unclear?!