In OA, MCQ regarding computer network and basic os, oops was asked. 3 rounds of interview happened, 1st was technical where i was asked to implement heap and binary tree and some related questions then was asked about computer networks like osi model and IP address, MAC addresses etc. In 2nd round, leetcode problem of trapping water was asked, then a web log was given including IP address, time frame, and request type and was asked to identify which user is spamming. Later asked to implement it for multiple users. A little about how network works then asked about ways to troubleshoot a slow computer. Finally the ETR (hr) round, only details were verified and asked why i want to join cisco.