I applied through university. The process took 1 week. I interviewed at Arista Networks in Nov 2015
Interview
I sent my resume during the on campus career fair, the interviewer then emailed me to schedule the interview. The interview was given on phone, through remote Telnet shell. The questions are codes that are well written in some .c files, and you should either explain how they work or rewrite them to realize certain function. They were not so hard, but you have to be quite familiar with C and shell commands.
Pretty good, not too complicated, was comfortable. Mostly LC questions, and was easy enough that you should be able to do it after doing NC150. good luck for the interview!
Starts with online test, then three rounds of technical interviews follow.
Not a lot of discussion, just go straight to the technical challenges which have to be solved in time
I interviewed at Arista Networks (Warsaw, Masovia)
Interview
By now I have had only first interview, that was focused on pure DSA. Despite that I would already recommend checking out gdb, cause it came in handy in my case.