What is the standard lighting equation?
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This site features a collection of common technical interview questions gathered by a group of programmers who have been through, and given, lots of technical interviews. There is an emphasis on C++ and game programming technical interviews, but most of the questions are relevant to any technical interview.
Discuss some of the pros and cons of using quaternions vs. matrices to represent 3D transformations.
Sketch out the main classes you would use if you were creating a skeletal animation system. Discuss the relationships between the classes and the datatypes that you would use to represent the data (i.e. arrays vs. linked-lists, quaternions vs. matricies, etc).
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Imagine you have an existing rendering engine. Suggest a way in which you could analyze the depth complexity of a scene simply by changing render states.
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