> Its like attending an exam, its not the same getting work done in the real world.

Of course it's not. Real world is much more stressful than an interview. During an interview you chat with another developer in a room with a whiteboard. In the real world you are woken up by a phone call at 4 AM to fix a critical system, knowing that if you screw up even slightly, you'll lose a very important customer. I've experienced both and I can confidently say that I prefer the former.