Applied through the website. Got call in just less than a month to schedule a HR video interview. Not much in it, typical HR questions. Next, got a mail to schedule technical interview for an hour. I chose signal processing and C language. Same questions as told by others in glassdoor. Questions on Convolution, properties of signals (causality, stability etc), difference b/w FIR and IIR filters etc. In C, main concentration goes to structures, pointers and some simple programs like finding a prime number, finding remainders, even and odd numbers etc. Questions on Basic maths deals with matrices and a bit of differential equations. Concepts of Rank of a matrix, Eigen values and Eigen vectors are very important. Though interview sounds a bit okay, competition is too high. So, answering all questions is very very important.