[vertex-four]

If you're asking them to design something rather than build something off a pre-existing design, you might like to know that they actually understand the principles of design, and aren't relying on a tool to pretend they do.

[superuser2]

It is completely reasonable to rely on a text editor and the language interpreter. Hell, even the language documentation.

This could be an issue with really fancy IDE features, but there's a world of difference between a whiteboard and an IDE - namely, a text editor and an interpreter/compiler.