Do you stand up if a senior walks in the room?

It is not very often that I am in a room where a senior walks in. I suppose it would depend on the situation. Generally, I wouldn't stand up for anyone walking into a room but I guess if it was a formal occassion or if it was someone who I didn't know very well and who commanded a lot of respect then I probably would stand up.

Yes, we stand up whenever an elders walks in the room. It is a part of our culture.

I do only when its a formal occasion and someone who is important enters the room. I think most people would stand up and greet a person anyway, unless it is a close friend, and the meeting is more casual.