The process began with an initial phone screen and 6 on-site interviews. The phone interview focused on Systems. I was asked about Threads/Processes, Synchronization Primitives, Parallelization and Distributed Systems. The phone screen ended with networking concepts (VLANs and MPLS). The on-site interviews focused on Networking, Systems and programming (C language). Each and every concept in the Operating Systems book were visited. The interviewers were very interested in knowing the design decisions I made while implementing the system level projects. Networking related questions covered VLANs, MPLS, VPNs, ARP, STP, BGP, OSPF, VRRP, etc. The fundamental concepts behind the protocols were tested. I was asked to write 3 programs - String based, bit manipulation and linked list based.