Is UCLA on campus housing random or first come first serve?

Is UCLA on campus housing (De Neve or Sunset Village Plaza) first-come first-serve? or is it randomly given to people who applied before May 1st?
I called the housing office and they said it was like a lottery but I just want to make sure I don’t have to choose a dorm right now.

A few years ago, when my son was a freshman, you ranked your presences for two categories. Dorm type: hall, plaza or suite and Room type: single, double or triple. I think my son ranked them: 1. Triple 2. Double 3. Single and 1. Hall 2. Plaza 3. Suite. He ended up in a triple plaza (DeNeve) which worked out fine. It didn’t matter when you applied for housing as long as it was by the due date.

Alright. That helped a lot! Thanks!