I applied online. The process took 1 week. I interviewed at Tellabs (San Jose, CA) in Apr 2011
Interview
Three people interviewed me(all techies). Questions about OS(process, threading), C Programing and also was asked to solve some puzzles. They went in depth for all the questions and was asked to write programs with syntax (just the pseudo code was not accepted).
Interview questions [1]
Question 1
Was asked to explain my project in detail and write C code to improve the existing code. This went for around 1.5 hrs