Meh, if you can't even handle a tiny whiteboard situation how are you going to handle any deadline pressure? It's not about knowing the right answer off the top of your head, it's more about how you work and approach the problem.
Sure some bad companies expect you to be able to write something very specific on the spot, but thous are pretty rare imo.
Sure some bad companies expect you to be able to write something very specific on the spot, but thous are pretty rare imo.