I initially received a call from HR regarding an opportunity. I accepted, and they scheduled an interview.

• 1st Round (Technical): The first round was technical, focusing mainly on Java, Data Structures, and a few thread-related questions about my work.
• 2nd Round (Dev Manager and Director): The next day, I received a call from the Dev Manager about the second round and it was scheduled for the following day. The interview was again decent. The focus was mainly on core Java file operations and a string problem. Then, a puzzle was asked. I answered most of them. Later, the Director joined the call and asked for details about my introduction and project experience. Finally, they rolled out the offer details.

I am now waiting for the offer letter. They mentioned it would take up to 20 days.

Find an element in a matrix where rows and columns are sorted in ascending order.

Implement the tail utility in Java to view the last N lines of a file. Also, handle the scenario where the file is 10GB in size.