MathWorks Applications Support Engineer (Internship) interview questions

technical interview was simple ..basic questions on Object oriented progmng like what is OOP, adv of OOP, how a graph is represented in practice, applications of null pointers, some code snippets(most of which u can find online) diff betn #define and const ,mutex,cache,JVM,JRE JDK difference, what is classpath, Big O notation: what is O( n!+n ) ? virtual destructor, structure union difference,