Microsoft

Easy enough: an online test using Codility, a call from a recruiter, and a three-round technical interview. This was followed up with a regular-style interview where you could discuss the role in depth.

I had several rounds of interviews with different people at Microsoft. These interviews varied in length, with some being long and others short. The elapsed time between interviews also varied, with some intervals being longer and others shorter.

A one-hour interview with an engineer. He had an ill-defined problem about a binary tree and became frustrated when asked for more details about the problem. The solution was a simple recursive function, but he wanted you to walk through what it wa