All the required knowledge mentioned on the website is
fair game, if you got an A in ODE's and linear you better know what an integrating factor and an eigenvector are respectively.
If you know C++ matlab code is close enough that you'll get it (this was my case).
Also the requirements specifically state that for the more theoretical stuff (measure spaces, analysis) "general knowledge" is the only thing required, common sense will tell you that they probably won't ask you to prove something on the spot but you could be asked for the epsilon-delta definition of a limit.
Remember that this is an applied masters!
The interview will also be
reflective of your background. If you wrote a paper or did an in-depth project there could be questions on those things.
Finally here's some great advice that I got over coffee from an HR consultant.
A thing that applicants lose sight of (in job and school applications) is that they are dealing with rational human beings (for the most part
) . When wondering what questions you'll get asked use your
common sense. If on the job or school application/website/info-sheet, there are words like "required" and "highly recommended" beside subjects this is most likely what you'll get asked about. Be honest with yourself and really evaluate whether or not you know and understand those "required" and "highly recommended" things. If not then go over them till you do, if so then you're probably prepared anyway!
They're not going to ask you to prove Fermat's last theorem or how to cure cancer. They're going to ask you about subjects required for the role/program and subjects that you claim to know, to test your aptitude and your honesty respectively.