Integer Process Development Engineer interview questions

Applied online through their career page. Received an email next day asking about my availability for a phone screen interview with a recruiter. Phone interview with the recruiter was very simple and straight forward questions, (why integers?, why this specific role?, weakness/strengths etc) The recruiter said she will write me back within few days to a week after she contact the hiring manager (regardless of the outcome). Never heard back and I followed up pass 1 week time. She mentioned the hiring manager has been out and will get back to me when she/he gets back. Received an email next morning stating I am not selected.