Cadence Design Systems Senior Design Engineer interview questions

Understanding of Fixed Point Arithmetic. Basic DSP questions, e.g. significance of linear phase etc. Coding questions, write a C code to implement a FIR filter, write a code to count the no. Of set bits in an integer, they also asked me to optimise of the same code, write a C code to draw a circle with one ; in an array full of zeros. Understanding of DSP architectures, questions from my resume. Some quant aptitude questions.