Dresden University of Technology

Established in 1828, the university has a total enrollment of 37,000 students as of 2013. The Technische Universität Dresden (usually translated from German as Dresden University of Technology and abbreviated TU Dresden or TUD) is a German elite university, the largest institute of higher education in the city of Dresden, the largest university in Saxony and one of the 10 largest universities in Germany. The university is one of the eleven German universities which succeeded in the Excellence Initiative in 2012, thus getting the title of a "University of Excellence". The TU Dresden succeeded in all three rounds of the German Universities Excellence Initiative (Future Concept, Graduate Schools and Clusters of Excellence).
German language eligibility:-
To be precise, yes all the courses at DUT are in German if not all then almost 8 out of 10 are. The university does not conduct any German language classes to help student overcome it, you have to prepare your knowledge yourself. The better part is that the classes aren’t compulsory so if you keep a private lecturer to teach you in English then that can be helpful but this is applicable only if you have load sum of money.
Exams required:-
As German is the major language in courses there should be a language course for students, but there isn’t. The professors do help you solve the communication gap but that would make your learning process slow. Nor does the university have any kind of German eligibility test for admissions; anyone can get into this university. There are few entrance tests depending on the kind of course you are getting in and those tests are to check your base knowledge for your subject and nothing else.