Cisco Software Engineer interview questions

Got a call from HR for a weekend walk-in. Around 30 people with experiences starting from 2 - 8 years came for the walk-in. First round was written test on c/data structures, networking and OS concepts. Some 10 people cleared the first round. All these 10 people were interviewed at the same time for the first round. First round was on basic c questions and questions on arrays/strings etc. Second round is on DS- stack/queue/linked list/tree etc. Third is bit of puzzles on math and few questions on c programming. Fourth round is on Networking concepts like L2/L3 stuff along with a simple queue program. 5th round is managerial round - mostly concentrated on behaviours aspects. And finally at 5PM, manager said you are selected and hr will call you. Overall experience was good while being interviewed.