Intel Corporation interview questions

I submitted my resume to Intel employees who'd come to collect resumes and talk about Intel. They were from the graphics group and wanted software/hardware engineers to work on Intel's integrated chips. I got a mail saying they were interested in my profile and asked for my availability for a phone screen. The phone screen tested: i) My C skills: String manipulation, Pointers ii) Graphics knowledge: The 3D pipeline, briefly describing each of the stages, depth/alpha testing, OpenGL vs DirectX (some very trivial stuff, if you've taken a graphics course) iii) Debugging: Visual Studio experience, debugging skills (straight-forward and not expecting much detail). I was selected for the on-site, and there, I had 5 1:1 interviews with several managers. The questions were related to: i) C, C++ : Lots of questions regarding pointer manipulation, type casting, const usage in member functions of classes, string manipulation ii) Image processing : I was asked to rotate an image by 90 degrees iii) Graphics: Again, 3D pipeline, general questions about pixel shaders, why they're needed, depth/alpha testing, finding intersection of lines/rectangles, OpenGL vs DirectX (testing if i knew anything about it). iv) Software Engineering: Tried to ask me about design patterns via a question, but I really didn't know enough about it.

I obtained this interview from internal referral. Start from a phone interview, asking about basic technical question and leadership. The onsite interview consists more questions about my technical background. The hiring manager asked some behavior question (assuming some scenario and ask what to do). Some of them challenged my research and try to see how I defense.