MathWorks Intern interview questions

applied online in the spring, contacted me within weeks, diverse range of questions, looking for analytical background, relatively easy interview (data structures and algorithms), two interviews, simple math problems, design patterns/oop/Java/C/C++/Python/Matlab

Email contact -> schedule interview time -> give you options to select three most familiar programming language includes: java, c, c++, html+css+javascript, matlab...... -> about one week time to prepare -> interview by telephone. I am chinese and accept my undergraduate education in chinese, so I have trouble to understand some questions which make the interviewer think I am an idiot......But these questions are really really very simple. When I understood what he was asking, I thought that he asked me such simple question because he thought I am stupid......