AFAIK they're ALL 1 queen/king and 1 pullout, so you should be good.
At Jambo the two largest savannas, Sunset and Arusha, both have giraffe and zebra, and you're definitely going to see them from your balcony as long as you've planned on spending at least one day in the room (iow don't expect to see as much of you're at the parks from Rope Drop to close). I've never stayed in a room facing the other savanna at Jambo so someone else would have to weigh in there, but the overwhelm majority of rooms face the two big ones, and if you request a room near the lobby (never a bad idea) you'll definitely get a room facing one them, most likely Arusha.