Microsoft Software Developer interview questions

First-round was the coding round where 3 questions were asked at cocubes platform. I cleared all the basic test cases in coding questions but still was not short-listed for the interview process. There are more test cases at the back that need to be cleared for clearing the round.

The interviewer introduced himself and then asked me to tell him about myself. Then he asked me to find longest common prefix from an array of strings. We discussed an approach and then I had to code it down. he also asked me about the time complexity and then asked me to optimise it. I gave another approach and then he asked me to code it and give the time complexity. We optimised the solution further with a new approach and I coded it too. The interviewer was satisfied.