After the initial HR phone call, I was given a list of questionnaires regarding my experience. A couple of days later, HR scheduled a phone technical interview. I felt the interviewer was rude, and his mobile phone kept buzzing in my ear as I was writing/explaining the code. It seemed to me he was exchanging texts while we were on the call.

It was a simple coding challenge in two parts:

1. Given an unsorted array of positive integers, find the maximum integer. Write test cases to test it. He wanted the test cases from a user's perspective, which he didn't mention earlier. I was approaching it from both the user and design perspectives. He conveyed this rudely.

2. For the same array, find the first and second largest integers. He kept saying, "I don't care about the solution, dude!" Even after explaining and refactoring my approach, he didn't understand it.