In OA, MCQs regarding computer networks and basic OS and OOPs were asked.

Three rounds of interviews occurred:

1. Technical Round: I was asked to implement a heap and a binary tree, along with related questions. I was also asked about computer networks, including the OSI model, IP addresses, and MAC addresses.

2. Technical Round: A LeetCode problem, "Trapping Rain Water," was presented. Subsequently, I was given a web log with IP addresses, timeframes, and request types, and asked to identify which user was spamming. Later, I was asked to implement this for multiple users. There was a brief discussion on how networks work, followed by questions on troubleshooting a slow computer.

3. ETR (HR) Round: Details were verified, and I was asked why I wanted to join Cisco.

Trapping Water (LeetCode Hard)

What is the OSI Model and its different layers (in short)?