In an era where that's possible, the expectation will be for humans to be working hand-in-hand with computers, whether to make superior code or answer better interview questions. The bar will simply be elevated, and you will have to judge candidates on their computer/human synergy. The only time that what you say could be a problem is if the technology to answer interview questions is far superior than that of doing actual work. But then there is the next round of interviews (in-person, etc.). This also kind'of exists today in the form of googling answers while on interview, which for some reason lots of companies don't like, even tho no coder isn't constantly googling on the job.