Amgen Data Science Co-op interview questions

Applied online. Received an email from the hiring manager to set up a 30-minute call. Questions regarding previous employer and general resume based questions. Received the next round invitation after following up twice. It was the final round with 3 team members. General questions again and nothing difficult or challenging as such. Didn't notify me about the decision even after a week. When followed up, received a 2 sentence mail saying they selected another candidate. Overall, not a great interview experience.