The written exams will be on-site. Please check the German web pages for current information.
Online exams are open-book exams. You work on your private computers and may use all materials from the lectures, lab, and programs like MATLAB.
On-site exams: You can use a calculator and the math lectures' formula collection (the short script). We will provide a (very concise) collection of formulas on Numerical Methods for the exam. For your preparation, you can download the formula collection here.
Further documents and aids (script, textbooks, electronic devices) may not be used.
Some past exams can be downloaded here.
Also, take a look at the page with the current lecture slides. There you will find more sample exams.