Microsoft Software Engineer Senior interview questions

A recruiter reached out via LinkedIn to gauge my interest in Microsoft asking for my CV. I sent her my CV only to receive a Codility assessment link via email. The first question was simple with a catch, and the second was a far more complex dynamic programming question - the entire assessment could be done in no more than 70 minutes. After completing the first question perfectly and not having enough time to test out a complete solution for the second question I received an email a week alter informing me they selected another candidate. For a senior position I would obviously expect a different interview path instead of a generic codility link.