Yes, definitely. What's the alternative - hire people who don't answer your question correctly? Only hire people who can give a good answer that's different fro

Yes, definitely. What's the alternative - hire people who don't answer your question correctly? Only hire people who can give a good answer that's different from the book? Hire people who have read the book but are good at pretending that they haven't? None of those make sense. If someone giving you a correct answer is concerning, just change the questions that you use. But it would be ridiculous to penalize people for preparing.