Amazon Robotics Embedded Software Engineer interview questions

1st round HR brief and expectation 2nd round , Embedded software related programming, There was a lot of value in what was asked. Things were very relevant to Embedded world. 3rd round , Data structures related programming. Interview was completely aligned to a Application Developer. The interviewer just went into a non-embedded zone. Program to determine if a path exist between 2 point like (x2, x15), given a (x1,x2),(x3,x8),,(xa,xn) This to be optimized would need Link lists, recursion , binary tree etc. most of which are avoid in embedded.