I applied through my university and I got an email from the recruiter to set up a phone interview. The first round was a phone interview round and he told me that the second round would also be a phone interview. The interviewer was very friendly.

Three rounds of phone interview. Each round focuses on C++ fundamental knowledges from functions, pointers, reference, algorithms, linux, gdb... Also you should get familiar with vim. Only a little bit hardware knowledge like verilog you should prepare.