Cisco Developer interview questions

Two back to back interviews. Each interview was one hour long. They did not ask about my experiences and they did not ask any behavioural questions. The first interview was really difficult. They asked low level systems/Linux questions. The second interview was medium leet code questions. They were pretty easy to do. They needed me to code them in C, but most of the time they did not need me to compile and show my answer. Pseudocode was generally good enough. There were also some pointer questions.