In first technical round, they asked me about my current work experience, projects that I am working on, and basics of Signal Processing, like DFT equations, FFT equation, block diagram of microcontrollers 8051, DSP6713 which I had mentioned in my CV. Then basic C questions like storage classes, Unions, structures, variables, extern keyword, void, static keywords.
In second technical round, he asked me about only C questions, many questions were repeated, like Unions, structures, variables, extern keyword, void, static keywords. Also he asked me to write simple code for adding two integers then asked me what will happen when I will run the code.
The Managerial and HR rounds were good. They asked me about my salary expectations and my current project work and questions like why do you want to join the company.