I see the topic has migrated away from the interviews, but I have a story about a fellow who was looking for an administrative assistant. He had three candidates, each coming from a different field and seeking to change career direction to management.
The manager decided he would test their viewpoints, so he chose a simple question: How much is 2 + 2 ?
The first applicant was an engineer. The manager asked his question. The engineer pulled out his old pocket calculator. In a moment, he said "2 + 2 = 3.99999999995 plus or minus 0.00000000006"
The second applicant was a programmer. The manager asked his question. The programmer said, "I'm not sure, but if you give me two junior coders, a small time-sharing system, and about two weeks to work out the program, I'll have an answer for you at the end of that time."
The third applicant was from a marketing background. The manager asked his question. The marketeer looked him straight in the eye and asked, "What would you like it to be?"