Basic java knowledge, math problems about linear algebra and calculus given some code and ask the output of the code
Sigiloso
It's essential to demonstrate that you can really go deep... there are plenty of followup questions and (sometimes tangential) angles to explore. There's a lot of Software Developer experts who've worked at MathWorks, who provide this sort of practice through mock interviews. There's a whole list of them curated on Prepfully. prepfully.com/practice-interviews