Cisco Developer interview questions

one technical interview with two interviewers, on-site. I was asked two technical questions. One was to implement an LRU cache from scratch, the other one was 2-sum. Afterwards I was asked to solve a stream processing question. All of the questions were solved on a board

the process which i undergo is the online assessment. I was asked 3 questions finding luckiest number in matrix, finding fibonacci substring, continuous sequence of integers with the largest sum.