Q&A Electives

No. An external elective (category 3.4) is from the elective lists by Control&Operations, Urbanism or other TIL fields. A free elective (category 3.5) is any course outside categories 3.1-3.4 and within the applicable rules. 

You can complete this course, but in your program it will be considered as a free elective (category 3.5). 

No, you have to fulfil the requirements in categories 3.1-3.4, however the Board of Examiners decides about free electives completed abroad (category 3.5).