Neutron

I am in the waitlist for UCLA's D.env program. As I understand from the concept of waitlist, they would only accept me of one of the accepted people declines the offer. But the date for accepting/rejecting university offers is April 15, does this mean I'll hear from UCLA about my application status after April 15? And by that time I would have already accepted one of the other offers that I have received (UC Davis, Univ of Wisconsin Madison, etc.). How does this work?

I applied to 2 schools in California. I got an offer from UC Davis, but I haven't heard back from UCLA yet.

Which program? I have applied for D.Env, had 3 interviews in the middle of the night but I haven't heard from them yet, it's been almost a month.