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Well, did she actually not know, or was she offended by the simplicity of the question? I graduated in ’95, and I still remember how to implement a binary tree, so it’s not like it’s something that’s so irrelevant you’ll forget a few years after graduation like, say, polynomial long division.

She was offended by it, as were a lot of her friends (all industry people with similar experience levels).

Imagine if someone asked you to conjugate verbs or graph sentences to demonstrate your English skills. Would you do well at it, even if you're a native speaker? After all, you learned that stuff in elementary school.

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