You are told when you get there that you must keep all of your stuff to one bulletin board per room. They do not supply you the bulletin board.
I don't think it matters how you mount it, as long as it isn't going to leave a huge mark on the wall. It might be better to use a nail or tack than mounting tape which may not come off or leave residue. A trick I learned in college when you are leaving for the year is to take white toothpaste and cover the holes. They aren't as noticeable.
You can probably get away with other things,
I think a couple of my roommates had posters on the wall, but would take them down for inspections. I've heard extreme stories where someone had one calendar on the wall and was made to take it down. I would start out on the safe side following the rules and maybe you can see what you can get away with as far as decorating!
I wish they would change the apartments they show on the E-presentation. You can't mount clocks and paintings on your walls!