You should be able to reason regardless of how big or interactive the surface you're messing around with is. The reason that big monitors are useful isn't beca

You should be able to reason regardless of how big or interactive the surface you're messing around with is. The reason that big monitors are useful isn't because it makes you smarter or more able to reason about trivial problems. It's because it provides more space to cross reference code, more space to look up documentation, and so on. For the sorts of questions that are being asked in an interview, you should be able to sketch out a solution on a whiteboard no problem.