Cisco Software Developer Engineer interview questions

I got an interview on campus. Basic questions about myself and the company: "Tell me about yourself", "How do I know if you are the right person for my company?"...No technical Then 1 month later I got an invitation including hotel and flight ticket to San Jose for 2 days. It started with a dinner with Cisco employees. The next days, we are divided into 3-person groups. Each group will be interview individually by 3 other engineers. They basically asked about my group projects. Gave some technical questions about Java like "What is inheritance?". The last guy will ask harder questions in C programming skill "Write a code to reverse the words in a string?" "Optimize it"