National Instruments Software Developer interview questions

The interviewer is a really nice lady. She first asked me about my projects appeared in my resume. We have talked some technical problems arised by each other. Then she asked me to solve a problem based on binary tree in both recursion and iterative ways. It is not hard. Then she asked me about the most intereting bug I have ever met. Then it is finished . One hour long.

Tests you on trees in the c language. Some behavioral questions in the beginning.