In my country, re-examinations are a common thing. Basically, if you miss your exam for whatever reason (or, if you do not pass), then you get an extra chance, under the same circumstances, and if you miss that one as well, you get one last chance.
My question is, is such a protocol normal? Are other countries also doing this? What are the benefits/drawbacks of such a policy?
My personal experience is that I can abuse this policy really easily. If I think I am going to do really badly on an exam, I may as well fail it on purpose (basically you hand in an empty piece of paper) and try to do better on my next attempt. Or, you can take the exam just to get a taste of how it's going to be like, what kind of questions you are going to be asked, and so on, and then you can fail it, and retake it this time being well-prepared. So is it really as 'bad' of a policy as I feel it is, and if so, what are the alternatives?