An interview question, how many broadcast and collision domains in a 24 port switch, with 4 hosts connected to two VLAN's

I said 2 broadcast domains (2 vlans) and 4 collision domains (4 connected hosts to 4 ports in up/up state).

interviewer did not seem convinced by the answer, I think he was expecting to her 24 collision domains, since it was a 24 port switch.

what do you guys think?