I applied online and got a phone call interview after 3 weeks. The interview lasted for 20 minutes. The questions included basic math questions, about differentiation, integration and linear algebra. Dot product and cross product. It included signal processing questions like what is FFT and what is DTFT. When is a system stable? and when is it BIBO? They also asked Java programming questions with some sample codes. These codes mainly required the understanding of inheritance.

There were three phases for recruiting procedures. The first stage was a brief and relaxing conversation, the second stage was about technical things and hiring manager asked several questions in the third stage.