Altera Senior Design Engineer interview questions

HR: mostly about my previous experience and why Altera Technical Phone interview: Basic digital design and code screening with C++ and Verilog. I was given a C++ code and there were several questions about it, variable scope, compiler error, dynamic memory and etc For verilog part i was given a puzzle about finding a sequence of zero in infinite sequence and trying to scale it and parameterize it on site: 5 hours of tense interview, questions about basic digital design, clock domain, writing verilog code for some puzzles, questions about script coding, protocols (PCI express, I2c , ...)