I applied online. The process took 2 days. I interviewed at Qualcomm in Aug 2009
Interview
I only had two phone interviews and wasn't invited for an in-person.
I had a few days in advance to plan for the interview and studied mostly C and general Linux. I did well on the few C questons they asked but not so well on the OS questions so if I were to interview again, I would study Linux much more in-depth.
Interview questions [2]
Question 1
Explain what happens at the OS level when you type the 'ls' command into a Linux shell.
I applied online. The process took 1 day. I interviewed at Qualcomm in Jan 2007
Interview
After applying I received a reply in one week for on site interview.
Overall the interview was pretty much technical. Questions ranged from regarding university project till the actual communication theory. I will advise to study your communications related modules properly before the interview.
Also the background of the company is important but I think it depends on whom is interviewing. I was interviewed by only engineers and hence wasn't really asked as much house keeping questions as I would had normally been.