I just wanted to ask if class switching will be available. For example i created a space marine and picked assault class later can i switch to devastator or do i need to create another character? I think we should be able to because there is so much to do in this universe and i would like to play different with my main character.

Yes, think of it like Planetside where if you die you can select a different class.

Class is what you deploy as as far as I am aware. I am having a dig around myself to clarify this but I would expect that you will not be limited, classes would be like load outs.

This is stated in many of the interviews and I believe it is written in the FAQ aswell. Do a tiny bit of research mate and you will find out there are answers to a lot of questions already!

like many multiplayer shooters you can switch loadout and class between respawns