One of my best technical interviews was from a lead engineer who simply asked more and more difficult questions until he found your limit (believe me, he knew more than anyone he would interview). His interest wasn't in what you knew so much as how you reacted when you hit the limits of your knowledge.
There's a lot of value in that approach. I don't use it myself when interviewing people, but I do try to accomplish the same end.
believe me, he knew more than anyone he would interview
He wouldn't really need to. By asking questions about very domain-specific knowledge, he could still achieve the same effect with anyone who didn't have a freakishly similar set of expertise.
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One of my best technical interviews was from a lead engineer who simply asked more and more difficult questions until he found your limit (believe me, he knew more than anyone he would interview). His interest wasn't in what you knew so much as how you reacted when you hit the limits of your knowledge.
There's a lot of value in that approach. I don't use it myself when interviewing people, but I do try to accomplish the same end.
He wouldn't really need to. By asking questions about very domain-specific knowledge, he could still achieve the same effect with anyone who didn't have a freakishly similar set of expertise.