Microsoft Software Development Engineer In Test (SDET) interview questions

there were two algo based coding question and some questions over complexity etc plus he asked about different testcase in which can do the whole white box testing of the code. first question was on addition of two very larg number then he ask which data structure i will use itold hithat i will use list then he asked me why i told him about limitation of array size but want to listen about the requirement of contiguous memory for array then he asked me write the code . then he asked about different testcase possible in final 10 min he give me problem to find median of two shorted arrays