A list of questions common when interviewing for a job as a Graphics Programmer

Some months ago, I interviewed for a job as a junior graphics programmer for various game companies, in order to break into the industry. Since computer graphics is a very niche field, there is not very much information out there on what questions are common during an interview for such a job. So I decided to compile this little list of common questions, and to write some general advice about how you can prepare for the interview. Hope someone finds this useful. :)

Should add "write me a pseudocode vertex shader and fragment shader", and a question or two about the order of magnitude costs for switching uniforms/buffers/framebuffers/shaders.