I am planning to do my Master programme in 2 years, can I do the exchange at the end of my second year?

I am planning to do my Master programme in 2 years, can I do the exchange at the end of my second year?

No, the exchange is a bonus for those who study nominally, in other words, who complete their Master programme in one year. Only in very exceptional cases (for example students who have completed a fulltime Board position or have started a second Master) an exchange is possible in the second year.