It was not a very technical interview at all. It mostly focused on getting to know what we have experienced and also how we work in a team and make decisions given scenarios. This leads me to the fact that the group exercise was the toughest part for me and everyone I talked to.

Overall, the other two parts (technical and competency) were extremely enjoyable, and I feel like both me and the interviewers would willingly just continue the conversation.

Explain polymorphism.